I gotta say I really liked this game. I am the type of person that really likes challenge and I thought the jump mechanic was really great! The addition of different block types was cool too! The music is not at all a seamless loop which is pretty annoying. I was going to suggest making it shorter so that players can reach a satisfying end point, but at the same time I was also driven to keep going to see how you use the different block types. Keep it up!