Update 7 - Challenge update

This is a big update to the game, making it more challenging to complete. This version is incompatible with previous save games. Here is a complete changelog: - Existing enemy types effects tweaks, and enhancements - New environmental effects - Increase performance - 6 new enemy types, 3 are tough boss like creatures - Fixed Worm water based attacks - Increased bat hitbox size - More Ammo boxes in the later areas - Lots of minor tweaks