A pretty good level. However, I'm going to rag on you a bit for the enemies. Environmental means no enemies; make it a Playground level otherwise. So, on my personal scale of 1 to 10, with 1 being the worst, and 10 being the best, I give this level a 6. I'm going to delete it, but I will definitely remember it for at least quite a while.
Great job for a first level!