I like the concept and the graphics are great! Using only two keys to move works 100%, but the movement is too "slippery" I feel, like you're sliding around on ice. After you release a button, the character keeps moving a bit, which makes the game too tricky. Because of this, I couldn't get very far. Also, a nice feature would be that if you press down both keys at exactly the same time, you would jump straight up.