Demo 4

Changelog:

• Ouroboros' stage added
• Grenades subweapon added
• Improved controller vibration
• Improved controller mappings
• Steam Deck support (sort of); Steam Big Picture launcher images and 16:10 support for the UI.
• Fixed some controller bugs
• Pause screen implemented finally. Now you can pause and switch weapons, or view their descriptions.
• M16 has cutscenes now.