diff --git a/vacation.p8 b/vacation.p8
index 2592360..62b60b6 100644
--- a/vacation.p8
+++ b/vacation.p8
@@ -473,6 +473,11 @@ phin_uw_pal = {
  [7]=135,
  [12]=140,
 }
+phin_err_pal = {
+ [2]=2,
+ [7]=7,
+ [12]=8,
+}
 
 phinstate_nrm = {
  s={4, 36, 4, 9},
@@ -536,6 +541,13 @@ phinstate_return = {
 phinstate_rise_wax = phinstate_dive_wane
 phinstate_rise_full = phinstate_dive_full
 
+phinstate_error = {
+ s={17},
+ ws=1,
+ hs=2,
+ p=phin_err_pal,
+}
+
 -- coordinates are the notional
 -- center point of the dolphin.
 -- many states are off-center.
@@ -547,6 +559,22 @@ toyphin = {
 }
 mknew(toyphin)
 
+function dive_bloop()
+ -- TODO: sfx, vfx for dive input
+end
+
+function jump_bloop()
+ -- TODO: sfx, vfx for jump input
+end
+
+function surfacing_splash(x, force, harder)
+ -- TODO: sfx, vfx for surfacing from a dive
+end
+
+function landing_splash(x, force, harder)
+ -- TODO: sfx, vfx for landing from a jump
+end
+
 function toyphin:update()
  -- entry mode?
  if not self.entered then
@@ -560,30 +588,85 @@ function toyphin:update()
   end
  end
 
+ local y, dy = self.y, self.dy
  -- button handling
- if self.entered and not self.exiting and not self.launching then
+ if self.entered and not self.exiting then
   if self.state.idle then
    if (btnp(0)) then
-    --TODO: launch upwards
+    jump_bloop()
+    dy=-4.125
    elseif (btnp(1)) then
-    --TODO: launch downwards
+    dive_bloop()
+    dy=4.125
    end
   else
-   --TODO: nudge momentum
+   dy += (btnp(1) and 0.1875 or 0) - (btnp(0) and 0.1875 or 0)
   end
  end
- if self.launching then
-  --TODO: advance launch mode
+
+ if (y > 64) dy += 0.375
+ if (y < 64) dy -= 0.375
+
+ local new_y = y + dy
+ if new_y  <= 64 && y > 64 then
+  -- surfacing
+  surfacing_splash(self.x, -dy, btn(0) and (dy > -4.125))
+  if btn(0) then
+   -- maybe boost
+   if dy > -4.125 then
+    new_y = 64 + ((dy + y - 64)/dy * -4.125) 
+    dy = 4.125
+   end
+  else
+   -- brake
+   if dy > -0.5 then
+    --stabilize
+    new_y = 64
+    dy = 0
+   else
+    dy /= 4
+    new_y = 48 + new_y/4
+  end
+ elseif new_y >= 64 && y < 64 then
+  -- landing
+  landing_splash(self.x, dy, btn(1) and (dy < 4.125))
+  if btn(1) then
+   -- maybe boost
+   if dy < 4.125 then
+    new_y = 64 - ((dy - y + 64)/dy * 4.125)
+    dy = 4.125
+   end
+  else
+   --brake
+   if dy < 0.5 then
+    --stabilize
+    new_y = 64
+    dy = 0
+   else
+    dy /= 4
+    new_y = 80 - new_y/4
+  end
+ end
+ y=new_y
+
+ local wet, st = y > 64, phinstate_error
+ if dy < -1.5 then
+  st = wet and phinstate_rise_full or phinstate_jump_full
+ elseif dy <= -0.5 then
+  st = wet and phinstate_rise_wax or phinstate_jump_wane
+ elseif dy < 0.5 then
+  -- handle idle special case later
+  st = wet and phinstate_return or phinstate_crest
+ elseif dy <= 1.5 then
+  st = wet and phinstate_dive_wane or phinstate_fall_wax
+ else
+  st = wet and phinstate_dive_full or phinstate_fall_full
  end
 
- if not self.state.idle then
- end
- --TODO: gravity
- --TODO: crossing 64
-
+ if (y == 64 and dy == 0) st = phinstate_nrm
  -- test mode
  --if (btn(5)) self.exiting = true
- 
+ self.y, self.dy, self.state = y, dy, st
 end
 
 -- hitbox for current state
@@ -594,6 +677,7 @@ end
 
 function toyphin:draw()
  local st, y = self.state, self.y
+ pal(st.p, 1)
  if (st.idle) y += wave()
  spr(st.s[1+(((t()<<1)&0x0.FFFF*#st.s)&0x7FFF)], self.x + st.xo, y + st.yo, self.state.ws, self.state.hs)
 end