Kill everything on all 8 levels.

Collect treasure dropped by dying enemies.
Destroy crates for more treasure and sometimes powerups:
	Yellow - Nuke
	Blue - Weapon Coolant
	Purple - Shield
	Red - Medic
	
Find exit doors located at the edges of the level map, (indicated by arrow tiles on the floor),
to leave the level and buy upgrades in the shop.

Avoid overheating guns (watch temperature bars in bottom left corner).

Move with WASD keys (or arrows).
Aim and fire with the mouse.
Cycle primary weapons using Q and E.
Cycle secondary weapons using Z and C
Activate shield using X.
Detonate Nuke with SPACE.

Pause with F or ENTER.
While paused you can view the map and any items you've collected (keys and runes).
From the map you can teleport into previously visited rooms.