Add new enemy, refactor a bit, add armor.

src/enemy/ebi.lua

@@ -0,0 +1,14 @@
+-- A shrimp-like enemy unit
+import "CoreLibs/object"
+import "CoreLibs/graphics"
+import "CoreLibs/sprites"
+import "entity"
+
+local gfx <const> = playdate.graphics
+
+class("Ebi").extends(Entity)
+
+function Ebi:init()
+   local img = gfx.image.new(10, 10, gfx.kColorBlack)
+   Ebi.super.init(self, img, 5)
+end

src/enemy/ika.lua

@@ -9,6 +9,6 @@ local gfx <const> = playdate.graphics
 class("Ika").extends(Entity)
 
 function Ika:init()
-   local img = gfx.image.new(30, 30, gfx.kColorBlack)
+   local img = gfx.image.new(50, 50, gfx.kColorBlack)
-   Ika.super.init(self, img, 25)
+   Ika.super.init(self, img, 25, 1)
 end

src/entity.lua

@@ -7,9 +7,10 @@ local gfx <const> = playdate.graphics
 
 class("Entity").extends(gfx.sprite)
 
-function Entity:init(img, health)
+function Entity:init(img, health, armor)
    Entity.super.init(self, img)
    self.health = health or 10
+   self.armor = armor or 0
 
    self:setCollideRect(0, 0, self:getSize())
 
@@ -20,7 +21,9 @@ function Entity:init(img, health)
 end
 
 function Entity:damage(amount)
-   self.health = math.max(self.health - amount, 0)
+   if amount < self.armor then return end
+
+   self.health = math.max(self.health - (amount - self.armor), 0)
 
    if self.health == 0 then
       self:remove()

src/main.lua

@@ -9,7 +9,8 @@ import "CoreLibs/graphics"
 import "CoreLibs/sprites"
 import "CoreLibs/timer"
 import "kani"
-import "ika"
+import "enemy/ika"
+import "enemy/ebi"
 
 local gfx <const> = playdate.graphics
 
@@ -28,6 +29,22 @@ function setup()
    enemy:moveTo(350, 120)
    enemy:add()
 
+   enemy = Ebi()
+   enemy:moveTo(300, 50)
+   enemy:add()
+
+   enemy = Ebi()
+   enemy:moveTo(300, 100)
+   enemy:add()
+
+   enemy = Ebi()
+   enemy:moveTo(300, 150)
+   enemy:add()
+
+   enemy = Ebi()
+   enemy:moveTo(300, 200)
+   enemy:add()
+
    makeWalls()
    
    drawBackground()