Add code for repeating waves of enemies, adding intro animations so the enemies can 'fly in', and refactor entity to use a state machine system for more flexibility.

src/kani.lua

@@ -42,6 +42,7 @@ class("Kani").extends(Entity)
 function Kani:init(ui)
    Kani.super.init(self, gfx.image.new("images/kani.png"), 100)
 
+   self.type = 'kani'
    self:setGroupMask(0x2)
    self:setCollidesWithGroupsMask(0xd)
 
@@ -76,6 +77,8 @@ function Kani:init(ui)
       end,
       AButtonUp = function() self:fire() end,
    }
+
+   self.fsm:changeState("READY")
 end
 
 function Kani:chargeReserve(change)
@@ -141,8 +144,8 @@ function Kani:removeInputHandlers()
 end
 
 -- move that crab!
-function Kani:update()
-   local collisions = Kani.super.update(self)
+function Kani:runReady()
+   local collisions = Kani.super.runReady(self)
    for i=0, #collisions, 1 do
       -- handle player-triggered collisions
    end