Hi,
The theme of the game seems really creative and philosophical, the visual with the player basically jumping around on their own head is also fun :D
The controls feel a bit weird, i would recommend using A and D for moving left and right and Space to jump, as thats more intuitive. Also, i wouldnt make the first level all that tricky. As a developer, you spend a lot of time Playtesting your own game and naturally get used to your controls, which might make levels feel too easy. But in the especially in the Beginning, its important to let the player learn the controls. So i recommend, dont make the first few levels all that hard, as the Player might get frustrated and quits early.
The Textures and visuals at large are really nice :D