Hi there, interesting game and since it is done in two months - congratulation.
Maybe you can add an option when you are crouching that you can raise in standing position with space, and than with second time hitting tha space you can jump.
It is not clear what item in the game is doing what except the heart. I assume this is because of early stage of the game. Since all walls are the same it is hard to know if player is progressing in the game. Maybe you can add some very high objects in the level so they can help the player to gat idea in which area they are at the moment. You can change material of the walls in different areas so player can know where teleport get him. At this point it is a bit hard to understand that.
So basically I think you can develop the story a bit (to make feeling of progression in the game), and to work on level design (to make player know where he is going and where he is at the moment)
Looking forward to see an update