Im pretty sure that graphics bug can be fixed by restarting the game. the window size thing i have not heard of yet so i'll take a look at it if i plan on updating the game at all after the jam is over.
the crank *does* add your exact RPM to the power every full rotation, but i do admit it is kinda hard to tell. i was planning on adding some more to it but unfortunately ran into time constraints.
more things to do probably would have been added if i had more time, but tbh i went WAYYYY heavy into level design instead of actual gameplay lol, its what im better at
really creative idea, the visuals could be a bit better (less engine assets! and try to fight that "unreal engine" look, if you know what i mean.) but the gameplay is pretty good! great work <3