Cool game, I would say that the controls/physics are quite unintuitive, for example if you're holding right when you jump it adds the force to the right. This is fine and I assume was what you were going for, but it is very different to how every other platformer handles controls. This is not necessarily a bad thing tho, as once you get used to the controls it is quite refreshing, there is just a huge learning curve. Also I think the lack of checkpoints doesn't help with the difficulty. All that being said the game looks great and I appreciate the innovation.