I like the concept overall! The camera definitely needs to be zoomed out a bit, at least in certain parts. Jumping to a platform blindly is one thing, but to one with a monster moving on it is reallly frustrating, especially when you have to time your jump from that to another platform like that. I also do really like the idea of adding layers of music with each checkpoint, but if you get stuck on one checkpoint you end up hearing a lot of the same little bit (aI think more could probably be added in each checkpoint). Not bad though, interesting idea. Nice job!