The controls are really nice, I like the art and the little jump animation. The concept of the map and player movement changing on death is really cool, but I feel like you didn't reach it's full potential. I died 3-4 times around the spawn area and then it became a simple platformer. You could have spaced out these changes to the map and player movement, because depending on how the player plays, all the changes can happen right at the very beginning of the level.
All in all really cool game, liked it a lot :)