Enhancement ideas

• Unlimited save slots
• Ability to switch between weapons
• Auto-saving when reaching a new level
• A "restart level" menu option
• Automap/mini-map
• Patch up broken level design (L3 unreachable bonus globes, M1 unreachable laser turrets, N5 softlock jump)
• Bonus state indicators (how many of each collected/remaining etc.)
• Display how much time is remaining for cloak/rapid fire
• Internationalization
• Controller rumble
• "Proper" checkpoint: Change the respawn beacon to do the equivalent of a quicksave, instead of what it does in the original
• Support for hardware OPL/AdLib boards, like OPL2LPT, OPL2 Audio Board, RetroWave OPL3, etc.
• Add option to show unused episode 4 end screen
• Allow rebinding the in-game menu keys (h, p, F2, F3)
• Alternative minimal HUD
• Alternative camera (stick to side of screen opposite walking direction)
• A system for overriding actor behavior via scripts, for more involved modding (e.g. Python, Lua or similar)
• Ability to add additional parallax layers
• High-res radar, showing more/further away enemies