Cool. Simple but good. Like the idea of hidden platform on the dimension change. As well as the slide on the edge collision, i think it's due to the round corner rectangle type shape. On the dimension change different types of danger will be great. Also change the music or tone of it or you can use a slow random variable to change the volume in time a little bit, it will give variation to it. Or you can simply use your voice in to make it fun just like mine XD. Overall nice game.