I've added some requested features, made some improvements and fixed some bugs!
ADDED:
- Resolution options for windowed gaming
- Lock cursor to game window option
- New level layouts
IMPROVED:
- Gun damage and ammo balances - Picked up weapons have now 50% less ammo
- Final boss kill ending sequence improved
BUG FIXES:
- Pick up gun while fishing and then reel the fish in with your gun has been fixed
- Shooting at skull crash fixed