Hello fellow screen-rotation bro. I just finished playing and i liked your game, limited screen rotations and one way movement makes for pretty decent puzzle potential.
I do have some pointers but nothing too big.
- Making the sprite square shaped would've helped approximating where you'll end up after rotating, the line on the current sprite helps but it's still a little unclear.
- The exit door could've been bigger, feels like you kinda have to snipe the exit otherwise you'll miss it.
- same goes for the coins and key, they're also pretty small and they could've been bigger. (At the very least the collision box)
- First level could've forced a low amount of rotates so you're immediately aware of the central mechanic and are forced to use it in a non threatening environment.
- Coin SFX would sometimes bug out and rapidly play.
Anyway i hope you can use this if you ever decide to revisit the concept.