Neat game, though 2D platformers are really tough to get to feel right. Currently there is no explination for walljumps, but also walljumps feel quite buggy. Additionally, it is very easy to clip yourself out of bounds using the clones, and the physics changing as you are aging throw off the feel of trying to make jumps, making it not a very smooth feeling platformer. The idea is there, it just needs some polish with the feel.