Great use of the theme and limitation, and the level design is very well stuctured to mix up the return journey. The cute pixel art style, and the light hearted sound design make for a great atmosphere that kept me coming back, even when dying numerous times in the same spot. I encountered a couple of small issues - being at the top of the ladder sometimes caused the sprite to flicker, and if you crash into the boulders, they're basically weightless, so you can push them out of the way, but these are minor gripes in a very well executed project.