Very impressive
I was impressed by how a combat system that simple could still be fun. The game played very well. There were a couple of problems I had with it though.
a) The music, while good, didn't change nearly often enough, so it started sounding very repetative. Not a huge problem by any means, but it may be something to think about in the sequel.
b) The jumping felt a little iffy. This became a bigger problem in the second half, which had a much larger emphasis on platforming.
Overall though, great work, hope you make more.