Things changed:

All enemy intervals have been adjusted to make the game more fair (especially for Mastery Mode)

Captain Salad is now blocked by the doors, however he will stay there until he has a movement with the door open. (Can stop this by using the light)

INVERT is now blocked by the doors, however he will kill you the first frame the door is open. (Use the light on the door)

Attempt to fix frame-rate glitch, but it made the game WAY too fast. Retrying in next update.

Next game soon (be patient)