diff --git a/src/art/tilesets/drips.png b/src/art/tilesets/drips.png
new file mode 100644
index 0000000..ec36ff4
Binary files /dev/null and b/src/art/tilesets/drips.png differ
diff --git a/src/datatypes.ts b/src/datatypes.ts
new file mode 100644
index 0000000..7a0e5c5
--- /dev/null
+++ b/src/datatypes.ts
@@ -0,0 +1,3 @@
+
+export type Stat = "AGI" | "INT" | "CHA" | "PSI";
+export const ALL_STATS: Array<Stat> = ["AGI", "INT", "CHA", "PSI"];
diff --git a/src/drawpile.ts b/src/drawpile.ts
index 08ceccf..44c87c2 100644
--- a/src/drawpile.ts
+++ b/src/drawpile.ts
@@ -1,15 +1,47 @@
+import {D, I} from "./engine/public.ts";
+import {Rect} from "./engine/datatypes.ts";
+
 export class DrawPile {
-  readonly #draws: {depth: number, op: () => void}[]
+  readonly #draws: {depth: number, op: () => void, onClick?: () => void}[]
+  #hoveredIndex: number | null;
 
   constructor() {
     this.#draws = []
+    this.#hoveredIndex = null;
   }
 
   add(depth: number, op: () => void) {
     this.#draws.push({depth, op});
   }
 
-  execute() {
+  addClickable(depth: number, op: (hover: boolean) => void, rect: Rect, enabled: boolean, onClick: () => void) {
+    let position = I.mousePosition?.offset(D.camera);
+    let hovered = false;
+    if (position != null) {
+      hovered = rect.contains(position);
+    }
+    if (!enabled) {
+      hovered = false;
+    }
+    if (hovered) {
+      this.#hoveredIndex = this.#draws.length;
+    }
+    this.#draws.push({depth, op: (() => op(hovered)), onClick: onClick})
+  }
+
+  executeOnClick() {
+    if (I.isMouseClicked("leftMouse")) {
+      let hi = this.#hoveredIndex;
+      if (hi != null) {
+        let cb = this.#draws[hi]?.onClick;
+        if (cb != null) {
+          cb();
+        }
+      }
+    }
+  }
+
+  draw() {
     let draws = [...this.#draws];
     draws.sort(
       (d0, d1) => d0.depth - d1.depth
diff --git a/src/engine/datatypes.ts b/src/engine/datatypes.ts
index b562c9a..7ca5d02 100644
--- a/src/engine/datatypes.ts
+++ b/src/engine/datatypes.ts
@@ -82,6 +82,20 @@ export class Size {
   }
 }
 
+export class Rect {
+  readonly top: Point;
+  readonly size: Size;
+
+  constructor(top: Point, size: Size) {
+    this.top = top;
+    this.size = size;
+  }
+
+  contains(other: Point) {
+    return (other.x >= this.top.x && other.y >= this.top.y && other.x < this.top.x + this.size.w && other.y < this.top.y + this.size.h);
+  }
+}
+
 export class Grid<T> {
   readonly size: Size;
   #data: T[][];
diff --git a/src/engine/internal/drawing.ts b/src/engine/internal/drawing.ts
index cd0b769..5c2f9ca 100644
--- a/src/engine/internal/drawing.ts
+++ b/src/engine/internal/drawing.ts
@@ -71,7 +71,7 @@ class Drawing {
     return mainFont.measureText({text, forceWidth})
   }
 
-  drawSprite(sprite: Sprite, position: Point, ix?: number, options?: {xScale?: number, yScale: number, angle: number}) {
+  drawSprite(sprite: Sprite, position: Point, ix?: number, options?: {xScale?: number, yScale: number, angle?: number}) {
     position = this.camera.negate().offset(position);
 
     let ctx = getScreen().unsafeMakeContext();
diff --git a/src/game.ts b/src/game.ts
index cf99dfc..47f712f 100644
--- a/src/game.ts
+++ b/src/game.ts
@@ -1,10 +1,11 @@
 import {desiredHeight, desiredWidth, getScreen} from "./engine/internal/screen.ts";
 import {BG_INSET, BG_OUTER, FG_TEXT} from "./colors.ts";
-import {checkGrid, ConceptualCell, maps, mapSzX, mapSzY} from "./maps.ts";
 import {D, I} from "./engine/public.ts";
-import {Grid, IGame, Point, Size} from "./engine/datatypes.ts";
-import {sprRaccoonWalking, sprStatPickup} from "./sprites.ts";
+import {IGame, Point, Rect, Size} from "./engine/datatypes.ts";
+import {sprDrips, sprRaccoonWalking, sprStatPickup} from "./sprites.ts";
 import {DrawPile} from "./drawpile.ts";
+import {HuntMode, MapCell} from "./huntmode.ts";
+import {ALL_STATS} from "./datatypes.ts";
 
 class MenuCamera {
   // measured in whole screens
@@ -45,6 +46,7 @@ export class Game implements IGame {
   camera: MenuCamera;
   state: GameState;
   huntMode: HuntMode;
+  gameplayDrawPile: DrawPile | null;
   frame: number;
 
   constructor() {
@@ -55,6 +57,7 @@ export class Game implements IGame {
     this.state = "Gameplay";
 
     this.huntMode = HuntMode.generate({depth: 1});
+    this.gameplayDrawPile = null;
     this.frame = 0;
   }
 
@@ -120,199 +123,142 @@ export class Game implements IGame {
         size: new Size(smallPaneW, smallPaneH),
       }
     }
-
   }
 
-  updateGameplay() {
-
-  }
-
-  drawGameplay() {
+  #moveCameraForGameplayDrawpile(cb: () => void) {
     let region = this.getPaneRegionForGameState("Gameplay")
-    // TODO: Draw
+
     let oldCamera = D.camera;
     D.camera = D.camera.offset(region.small.position.negate());
 
-    let drawpile = new DrawPile();
-
-    let globalOffset =
-      new Point(this.huntMode.player.x * 32, this.huntMode.player.y * 32).offset(
-        new Point(-192, -128)
-      )
-
-
-    for (let y = 0; y < mapSzY; y += 1) {
-      for (let x = 0; x < mapSzX; x += 1) {
-        let cellOffset = new Point(x * 32, y * 32).offset(globalOffset.negate());
-        let cellData = this.huntMode.cells.get(new Point(x, y))
-
-        this.#drawMapCell(drawpile, cellOffset, new Point(x, y), cellData);
-      }
-    }
-    this.#drawPlayer(drawpile, globalOffset);
-
-    drawpile.execute();
-
-    D.drawText("hello", new Point(0, 0), FG_TEXT);
+    cb();
 
     D.camera = oldCamera;
   }
 
+  updateGameplay() {
+    var drawpile = new DrawPile();
+
+    this.#moveCameraForGameplayDrawpile(() => {
+      let globalOffset =
+        new Point(this.huntMode.player.x * MAP_CELL_ONSCREEN_SIZE.w, this.huntMode.player.y * MAP_CELL_ONSCREEN_SIZE.h).offset(
+          new Point(-192, -192)
+        )
+
+      let map = this.huntMode.cells;
+      for (let y = 0; y < map.size.h; y += 1) {
+        for (let x = 0; x < map.size.w; x += 1) {
+          let cellOffset = new Point(x * MAP_CELL_ONSCREEN_SIZE.w, y * MAP_CELL_ONSCREEN_SIZE.h).offset(globalOffset.negate());
+          let cellData = this.huntMode.cells.get(new Point(x, y))
+          let belowIsBlock = true;
+          if (y < map.size.h - 1) {
+            let below = this.huntMode.cells.get(new Point(x, y + 1));
+            belowIsBlock = !below.revealed || below.content.type == "block";
+          }
+
+          this.#drawMapCell(drawpile, cellOffset, new Point(x, y), cellData, belowIsBlock);
+        }
+      }
+      this.#drawPlayer(drawpile, globalOffset);
+
+      drawpile.executeOnClick();
+    });
+
+    this.gameplayDrawPile = drawpile;
+  }
+
+  drawGameplay() {
+    // TODO: Draw
+
+    this.#moveCameraForGameplayDrawpile(() => {
+      this.gameplayDrawPile?.draw();
+
+      // D.drawText("shapes", new Point(0, 0), FG_TEXT);
+    });
+  }
+
   #drawMapCell(
     drawpile: DrawPile,
     cellOffset: Point,
     mapPosition: Point,
     cellData: MapCell,
+    belowIsBlock: boolean
   ) {
     const OFFSET_FLOOR = -256;
     const OFFSET_AIR = 0;
-    const depth = cellOffset.y;
+    const depth = mapPosition.y;
     const onFloor = OFFSET_FLOOR + depth;
     const inAir = OFFSET_AIR + depth;
 
-    if (cellData.content.type == "block") {
-      return;
-    }
-    /*
     if (!cellData.revealed) {
       return;
     }
-     */
+
+    let cellTopLeft = cellOffset.offset(new Size(-MAP_CELL_ONSCREEN_SIZE.w / 2, -MAP_CELL_ONSCREEN_SIZE.h / 2));
+    let cellSize = MAP_CELL_ONSCREEN_SIZE;
+
+    if (cellData.content.type == "block") {
+      if (!belowIsBlock) {
+        drawpile.add(inAir, () => {
+          D.drawSprite(sprDrips, cellOffset.offset(new Point(0, -cellSize.h)), 1, {xScale: 3, yScale: 3})
+        })
+      }
+      return;
+    }
 
     // draw inset zone
-    drawpile.add(onFloor, () =>
-      D.fillRect(cellOffset.offset(new Size(-16, -26)), new Size(32, 32), BG_INSET)
+    drawpile.addClickable(onFloor,
+      (hover: boolean) => {
+        D.fillRect(cellTopLeft, cellSize, hover ? FG_TEXT : BG_INSET)
+      },
+      new Rect(cellTopLeft, cellSize),
+      cellData.nextMoveAccessible,
+      () => {
+        this.huntMode.movePlayerTo(mapPosition)
+      }
     );
 
-    /*
-    if (!cellData.revealed) {
-      // TODO: draw some kind of question mark
-      D.drawText("?", cellOffset.offset(new Point(12, 8)), FG_TEXT);
-      return
+    if (belowIsBlock) {
+      // draw the underhang
+      drawpile.add(onFloor, () => {
+        D.drawSprite(sprDrips, cellOffset.offset(new Point(0, cellSize.h/2)), 0, {xScale: 3, yScale: 3})
+      })
     }
-     */
+
     if (cellData.content.type == "statPickup") {
       let content = cellData.content;
       let extraXOffset = 0; // Math.cos(this.frame / 80 + mapPosition.x + mapPosition.y) * 1;
-      let extraYOffset = 0; // Math.sin(this.frame / 50 + mapPosition.x * 2+ mapPosition.y * 0.75) * 6 - 3;
+      let extraYOffset = Math.sin(this.frame / 50 + mapPosition.x * 2+ mapPosition.y * 0.75) * 6 - 18;
       drawpile.add(inAir, () => {
         D.drawSprite(
           sprStatPickup,
           cellOffset.offset(new Point(extraXOffset, extraYOffset)),
-          ALL_STATS.indexOf(content.stat)
+          ALL_STATS.indexOf(content.stat),
+          {
+            xScale: 3,
+            yScale: 3,
+          }
         )
       });
     }
   }
 
   #drawPlayer(drawpile: DrawPile, globalOffset: Point) {
-    let cellOffset = new Point(this.huntMode.player.x * 32, this.huntMode.player.y * 32).offset(globalOffset.negate())
+    let cellOffset = new Point(this.huntMode.player.x * MAP_CELL_ONSCREEN_SIZE.w, this.huntMode.player.y * MAP_CELL_ONSCREEN_SIZE.h).offset(globalOffset.negate())
     drawpile.add(this.huntMode.player.y, () => {
       D.drawSprite(
         sprRaccoonWalking,
-        cellOffset
+        cellOffset.offset(new Point(0, 22)),
+        0, {
+          xScale: 3,
+          yScale: 3
+        }
       )
     });
   }
 }
 
-type Stat = "AGI" | "INT" | "CHA" | "PSI";
-const ALL_STATS: Array<Stat> = ["AGI", "INT", "CHA", "PSI"];
-type MapCellContent =
-  {type: "statPickup", stat: Stat} |
-  {type: "stairs"} |
-  {type: "empty"} |
-  {type: "block"}
+const MAP_CELL_ONSCREEN_SIZE: Size = new Size(96, 48)
 
-type MapCell = {
-  content: MapCellContent,
-  isValidSpawn: boolean,
-  revealed: boolean
-}
-
-class HuntMode {
-  depth: number
-  cells: Grid<MapCell>
-  player: Point
-
-  constructor({depth, cells, player}: {depth: number, cells: Grid<MapCell>, player: Point }) {
-    this.depth = depth;
-    this.cells = cells;
-    this.player = player;
-
-    checkGrid(this.cells);
-  }
-
-  static generate({depth}: {depth: number}) {
-    let mapNames: Array<string> = Object.keys(maps);
-    let mapName = mapNames[Math.floor(Math.random() * mapNames.length)];
-    let map = maps[mapName];
-
-    let cells = map.map((ccell, _xy) => {
-      return this.#generateCell(ccell);
-    })
-
-    let validSpawns = [];
-    for (let x = 0; x < cells.size.w; x++) {
-      for (let y = 0; y < cells.size.h; y++) {
-        let position = new Point(x, y);
-        if (cells.get(position).isValidSpawn)  {
-          validSpawns.push(position);
-        }
-      }
-    }
-    let player = choose(validSpawns);
-    cells.get(player).content = {type: "empty"};
-
-    if (Math.random() < 0.75) {
-      while (true) {
-        let x = Math.floor(Math.random() * mapSzX);
-        let y = Math.floor(Math.random() * mapSzY);
-        let xy = new Point(x, y);
-
-        let item = cells.get(new Point(x, y));
-        if (player.equals(xy)) {
-          continue;
-        }
-        if (item.content.type == "block") {
-          continue;
-        }
-        item.content = {type: "stairs"}
-        break;
-      }
-    }
-
-    return new HuntMode({depth, cells, player})
-  }
-
-  static #generateCell(conceptual: ConceptualCell): MapCell {
-    switch (conceptual) {
-      case "X":
-        return { content: {type: "block"}, revealed: true, isValidSpawn: false};
-      case " ":
-        return { content: HuntMode.#generateContent(), revealed: false, isValidSpawn: false };
-      case ".":
-        return { content: HuntMode.#generateContent(), revealed: false, isValidSpawn: true };
-    }
-  }
-
-  static #generateContent(): MapCellContent {
-    // stat pickup
-    let gsp = (): MapCellContent => {
-      return {type: "statPickup", stat: choose(ALL_STATS)}
-    };
-    // TODO: Other objects?
-    return choose([
-      gsp, gsp, gsp, gsp
-    ])();
-  }
-}
-
-function choose<T>(array: Array<T>): T  {
-  if (array.length == 0) {
-    throw `array cannot have length 0 for choose`
-  }
-  return array[Math.floor(Math.random() * array.length)]
-}
 
 export let game = new Game();
\ No newline at end of file
diff --git a/src/huntmode.ts b/src/huntmode.ts
new file mode 100644
index 0000000..1591257
--- /dev/null
+++ b/src/huntmode.ts
@@ -0,0 +1,151 @@
+import {Grid, Point, Size} from "./engine/datatypes.ts";
+import {ConceptualCell, maps} from "./maps.ts";
+import {ALL_STATS, Stat} from "./datatypes.ts";
+
+export type MapCellContent =
+  {type: "statPickup", stat: Stat} |
+  {type: "stairs"} |
+  {type: "empty"} |
+  {type: "block"}
+
+export type MapCell = {
+  content: MapCellContent,
+  isValidSpawn: boolean,
+  revealed: boolean,
+  nextMoveAccessible: boolean,
+}
+
+export class HuntMode {
+  depth: number
+  cells: Grid<MapCell>
+  player: Point
+
+  constructor({depth, cells, player}: {depth: number, cells: Grid<MapCell>, player: Point }) {
+    this.depth = depth;
+    this.cells = cells;
+    this.player = player;
+  }
+
+  // == map generator ==
+  static generate({depth}: {depth: number}) {
+    let mapNames: Array<string> = Object.keys(maps);
+    let mapName = mapNames[Math.floor(Math.random() * mapNames.length)];
+    let map = maps[mapName];
+
+    let baseCells = map.map((ccell, _xy) => {
+      return this.#generateCell(ccell);
+    })
+
+    let cells = new Grid(
+      new Size(baseCells.size.w + 2, baseCells.size.h + 2), (xy) => {
+        let offset = xy.offset(new Point(-1, -1));
+        if (offset.x == -1 || offset.y == -1 || offset.x == baseCells.size.w || offset.y == baseCells.size.h) {
+          return this.#generateBoundaryCell();
+        }
+        return baseCells.get(offset)
+      }
+    )
+
+    let validSpawns = [];
+    for (let x = 0; x < cells.size.w; x++) {
+      for (let y = 0; y < cells.size.h; y++) {
+        let position = new Point(x, y);
+        if (cells.get(position).isValidSpawn)  {
+          validSpawns.push(position);
+        }
+      }
+    }
+    let player = choose(validSpawns);
+    cells.get(player).content = {type: "empty"};
+
+    if (Math.random() < 0.75) {
+      while (true) {
+        let x = Math.floor(Math.random() * cells.size.w);
+        let y = Math.floor(Math.random() * cells.size.h);
+        let xy = new Point(x, y);
+
+        let item = cells.get(new Point(x, y));
+        if (player.equals(xy)) {
+          continue;
+        }
+        if (item.content.type == "block") {
+          continue;
+        }
+        item.content = {type: "stairs"}
+        break;
+      }
+    }
+
+    let hm = new HuntMode({depth, cells, player})
+    hm.#updateVisibilityAndPossibleMoves();
+    return hm;
+  }
+
+  static #generateCell(conceptual: ConceptualCell): MapCell {
+    switch (conceptual) {
+      case "X":
+        return { content: {type: "block"}, revealed: false, isValidSpawn: false, nextMoveAccessible: false};
+      case " ":
+        return { content: HuntMode.#generateContent(), revealed: false, isValidSpawn: false, nextMoveAccessible: false };
+      case ".":
+        return { content: HuntMode.#generateContent(), revealed: false, isValidSpawn: true, nextMoveAccessible: false };
+    }
+  }
+
+  static #generateBoundaryCell() {
+    return this.#generateCell("X");
+  }
+
+  static #generateContent(): MapCellContent {
+    // stat pickup
+    let gsp = (): MapCellContent => {
+      return {type: "statPickup", stat: choose(ALL_STATS)}
+    };
+    // TODO: Other objects?
+    return choose([
+      gsp, gsp, gsp, gsp
+    ])();
+  }
+
+  // == update logic ==
+  #updateVisibilityAndPossibleMoves() {
+    for (let x = 0; x < this.cells.size.w; x++) {
+      for (let y = 0; y < this.cells.size.h; y++) {
+        let position = new Point(x, y);
+        let data = this.cells.get(position);
+
+        data.nextMoveAccessible = false;
+        if (
+          Math.abs(x - this.player.x) <= 1 &&
+          Math.abs(y - this.player.y) <= 1
+        ) {
+          data.revealed = true;
+          if (!this.player.equals(position)) {
+            data.nextMoveAccessible = true;
+          }
+        }
+
+      }
+    }
+  }
+
+  #collectResources() {
+    let present = this.cells.get(this.player);
+    if (present.content.type == "statPickup") {
+      present.content = {type: "empty"};
+    }
+  }
+
+  movePlayerTo(newPosition: Point) {
+    this.player = newPosition;
+    this.#updateVisibilityAndPossibleMoves();
+    this.#collectResources();
+  }
+}
+
+function choose<T>(array: Array<T>): T  {
+  if (array.length == 0) {
+    throw `array cannot have length 0 for choose`
+  }
+  return array[Math.floor(Math.random() * array.length)]
+}
diff --git a/src/maps.ts b/src/maps.ts
index be200cf..2a6e6c0 100644
--- a/src/maps.ts
+++ b/src/maps.ts
@@ -1,15 +1,5 @@
 import {Grid} from "./engine/datatypes.ts";
 
-export const mapSzX = 12;
-export const mapSzY= 9;
-
-export function checkGrid<T>(grid: Grid<T>): Grid<T> {
-  if (grid.size.w != mapSzX || grid.size.h != mapSzY) {
-    throw `map must be ${mapSzX}x${mapSzY}, not ${grid.size}`
-  }
-  return grid;
-}
-
 export type ConceptualCell = "X" | "." | " ";
 
 function loadMap(map: Array<string>): Grid<ConceptualCell> {
diff --git a/src/sprites.ts b/src/sprites.ts
index df6f4ce..b5ec148 100644
--- a/src/sprites.ts
+++ b/src/sprites.ts
@@ -8,6 +8,7 @@ import imgSnake from "./art/characters/snake.png";
 import imgRaccoon from "./art/characters/raccoon.png";
 import imgRaccoonWalking from "./art/characters/raccoon_walking.png";
 import imgStatPickup from "./art/pickups/stats.png";
+import imgDrips from "./art/tilesets/drips.png";
 import {Point, Size} from "./engine/datatypes.ts";
 
 /*
@@ -29,6 +30,11 @@ export let sprRaccoonWalking = new Sprite(
 );
 
 export let sprStatPickup = new Sprite(
-  imgStatPickup, new Size(32, 32), new Point(16, 26),
+  imgStatPickup, new Size(32, 32), new Point(16, 16),
   new Size(4, 1), 4
 );
+
+export let sprDrips = new Sprite(
+  imgDrips, new Size(32, 24), new Point(16, 0),
+  new Size(2, 1), 2
+);