Today I worked back in collisions with quite a few improvements to the collision engine. I also added back in the perimeter object for towers. Won't be long now before I have towers shooting at those critters with an abandon again, but I didn't want to rush it! So, hopefully I'll get another hour or so of work on this tonight, so that I can get that in there before tomorrow. Deadline is swiftly approaching, sunday at 11:55 PM!

What's critical to get back in now is:
- Towers shooting at critters within it's perimeter
- Critters can die
- Earn score by shooting critters
- Spend score by building towers
- Critters attacking building makes building lose life
- When building dies, go to GameOver state
- Add logic for spawning critter waves
- Set goal for level (f.ex. kill 10 waves!)
- When goal reached, go to LevelCompleted state or GameWon state
- Start game at MainMenu state

So quite a lot left to do! But it shouldn't be impossible :P