Interesting idea, I like how much mileage you got out of so few actual level designs.
If you wanted to improve, I suggest taking away control when the character dies, a number of times I died, was able to reach the end and glitch myself to the next level. I think you also need to explain some of the mechanics more then just the level title. On a number of them I was very confused what to do or what I could do.
Overall an interesting concept.