several more fixes, now runs to the end but shot offset is wrong

vacuum_gambit.p8

@@ -713,7 +713,7 @@ blast = bullet_base.new{
  
  damage = 4,
  dx = 0,  -- px/frame
- dy = 2,
+ dy = -2,
  awaitcancel = false,
 
  -- disable damage for 2 frames
@@ -807,7 +807,8 @@ function protron_gun_e:actually_shoot(x, y)
   b2:spawn_at(x,y)
  end
  local bup = self.munition.new{
-  dy=4*m
+  dx=0,
+  dy=4*m,
  }
  bup:spawn_at(x,y)
 end
@@ -1894,7 +1895,7 @@ powerup = bullet_base.new{
  -- easy to pick up
  dx = 0,
  dy = 1.5, -- 0.75 after enemyspd
- enemy = true, -- collides with player ship
+ category = enemy_blt_cat, -- collides with player ship
  damage = 0,
  
  anim_speed = 2,
@@ -1927,9 +1928,8 @@ repair = powerup.new{
   width = 12,
   height = 12
  },
- center_x_off = 4,
- top_y_off = 0,
- bottom_y_off = 0,
+ x_off = 4,
+ y_off = 0,
  sprites = sheen8x8,
  hitship = function(self, ship)
   if (ship ~= primary_ship) return false
@@ -1955,9 +1955,8 @@ gun_swap = powerup.new{
   height = 16
  },
  -- gun = gun_type.new{}
- center_x_off = 6,
- top_y_off = 0,
- bottom_y_off = 4,
+ x_off = 6,
+ y_off = 0,
  width = 2,
  height = 2,
  sprites = {64, 66, 68, 70, 72, 74, 76, 78},