Gorgeous looking game with a haunting soundtrack. You also hit the target with the implementation of the theme. My feedback is I felt the players movement was a little slippery and the jump a bit floaty. I would also map all the actions to the keyboard unless you needed the mouse specifically in the game. There was also the display aspect issues where the sides got cut off in the main menu as others said.
Overall I had a really fun time with this, well done!