I think you must have uploaded just the exe rather than the exe and all the content folders together in a zip, but I played at the the link in the comments. The rules of the game were intuitive. I think you could make this game more difficult and fun if you add knock-back effects when you touch the bigger enemies instead, for example. I avoided them, because I thought there would be consequences if I touched them, but then one hit me and I realised there weren't.