I had a fun time playing this one. I was able to logically figure out where to go and I had a super difficult time with the boss so I deem it a success! My one suggestion would be adding more music and maybe an original organ piece for the beginning. However, I know the time crunch with these jams and like you said below, you needed to go for assets. But I feel this could be a cool idea to be developed into a bigger game and hopefully you will!