I would have to agree with the statement the game is too easy, especially given the bottom platform being mostly unobstructed. Sometimes the red guys will unpredictably fall on you if you have poor reaction speed like me, but otherwise it's essentially free. Coins only spawn on the upper platforms, but you won't need them to recover lives if you don't lose them. Plus, it's not intuitive you can kill critters for scoring - I hadn't known until I saw your comment saying so. Otherwise, while I like the idea of a procedurally-generated platformer, it really needs more mechanical identity to compensate, whatever you'd want that to be.
Also, small bug report: sometimes, coins spawn on top of spikes.