thrust performance is now also an option

vacuum_gambit.p8

@@ -1038,10 +1038,10 @@ player = mknew(ship_m.new{
  y=96,
  xmomentum = 0,
  ymomentum = 0,
- maxspd = 2.5, -- momentum cap
- thrust = 0.25, -- momentum added from button
+ maxspd = 1.5, -- momentum cap
+ thrust = 0.1875, -- momentum added from button
  ymin = 0, ymax = 120, -- stay on screen
- drag = 0.125, -- momentum lost per frame
+ drag = 0.0625, -- momentum lost per frame
  slip = false, -- does not slide down screen
  act = function(self)  -- fetch buttons
   local b,th = btn(),self.thrust
@@ -1074,7 +1074,7 @@ function player:small_upgrade_opts()
  if (pr == 0 and self.shieldpenalty > 0x0.003c) pr = 0x0.0001
 
  local ret = {{
-  icon=1,
+  icon=53,
   hdr="hull",
   body=[[    armor
 
@@ -1084,7 +1084,7 @@ function player:small_upgrade_opts()
    self.hp += 2
   end,
  },{
-  icon=1,  -- todo: icon
+  icon=52,
   hdr="shield",
   body=[[  capacity
 
@@ -1093,11 +1093,24 @@ function player:small_upgrade_opts()
    self.maxshield += 1
    self.shield += 1
   end,
+ },{
+  icon=1,
+  hdr="thrusters",
+  body=[[performance
+ 
+move faster,
+steer faster]],
+ action=function()
+  --maxspd thrust drag
+  self.maxspd += 0.5
+  self.thrust += 0.0625
+  self.drag += 0.03125
+ end,
  }}
 
  if cdr > 0 then
   add(ret, {
-   icon = 1, --todo: icon
+   icon = 6,
    hdr = "shield",
    body=[[charge rate
  
@@ -1110,11 +1123,11 @@ function player:small_upgrade_opts()
 
  if pr > 0 then
   add(ret, {
-   icon = 1, --todo: icon
+   icon = 6,
    hdr = "shield",
    body=[[disruption
  
-  ]] .. tostr(ceil(100 * pr / self.shieldpenalty)) .. "% shorter",
+ ]] .. tostr(ceil(100 * pr / self.shieldpenalty)) .. "% shorter",
    action = function()
     self.shieldpenalty -= pr
    end
@@ -1689,7 +1702,7 @@ end
 -- when near player ship
 
 function xp_gem:hitship(ship)
- if (ship ~= primary_ship) return false
+ if (ship ~= primary_ship or primary_ship.dead) return false
  primary_ship.xp += self.val
  primary_ship.last_xp_frame = lframe
  return true