Good, smooth controls. The artwork wasn't the best but it suited the game well. One thing it lacked, in my opinion, was a little more difficulty. The only hard parts were the mazes of single blocks, which were only really difficult when the screen was shaking. This only made it a little more annoying when you fell off because there was no checkpoints. The controls were good though, so you didn't fall off often. To make it a little more difficult, you should add some more obstacles and more movement of platforms and enemies etc. Things such as moving spikes or enemies that move through a certain path. This game has nothing but walking and jumping, so the only difficulty comes from a need of precision. Without other movement, jumping through courses of single blocks are going to be as hard as it will get. If you continue to make platformers, you should include checkpoints and more animated environments. Another idea would be a more interesting plot. But apart from that, the rest was spot on 5/5.