I really like the concept of this, I can see what you are aiming for. Unfortunately the game crashed a couple of times so it became frustrating to play. I also managed to put my rock down and couldn't get back to it. I understand that the placement is part of the puzzle, but there is not way to undo or go back to try the puzzle again without having to completely restart.
I like the look of everything, and the music while loud is nice. You really need to be able to access the settings menu from the pause menu in case you want to adjust something mid game. I can see the potential in this and I like the idea of manipulating the environment instead of the character, but sadly I think the execution is lacking a little. Give this game some work and some polish and it could be great