Really funny writing and voice acting, this is the most complete feeling incomplete game I've ever seen. Also, great reward for getting all the coins!
I got 2 endings (not sure if there's more), and had a good time trying to break the game in as many ways as possible. You accounted for an alarming amount of possibilities.
The only thing I'd adjust is the beginning section by adding some way for returning players to bypass everything up until the first countdown room. Maybe there could be a hidden dev-door that's only seen at the end of the game. The beginning is a great introduction to the game, but during my later playthroughs it felt like more of an obstacle I had to wait through before I could really try breaking things. Granted it's possible I missed something that would allow me to skip it (I am not the most observant person), and I can't really fault a jam game that much for having one slight issue with pacing that only becomes apparent after your first playthrough.
Great work with this!