Adding the option to turn vsync off caused some problems. Mostly because anyone who had a save file made before v1.0.4 had it turned OFF automatically when loading the new patch. Now the option turns red to warn that turning vsync off is not recommended. I also added the option to limit the FPS to 30. But I don't know why anyone would want to do that. Maybe you can limit the FPS at 30 and turn the resolution down for an authentic retro experience?
Also, very important! I've fixed the above mentioned bug with the save system, but any changes involving the save system have a chance to super break the game. I've learned from the previous breakages and tested the game with both, a new save file and a complete file. I found no problems. But still, If you spot anything, don't hesitate to let me know.