Project 2:	
	Add a flying enemy!
	To shoot:  Put a projectile into motion going the right way
	But what if it hits us?
		We'll add invincibility mode
		This can go in the menu
		For that matter, the menu ought to be able to come and go

The rest of the projects:
	Every 2 weeks or so
	Last one will be due when the final exam starts
	No more labs

Improvements for today:
	Organizational changes
	Dangerous and non-dangerous objects
		Dangerous to who?
	Adding a second weapon
	Projectiles should hit walls