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