I'm sorry this is lava world why is there grass?
I agree with MercuryPenny for the most part. The level does get more difficult as it goes on, but mostly due to increased sprite spam than clever enemy placement. There is a very minor subtheme of bouncing on wigglers over munchers, and I personally would like to see you develop this theme in the second half to give the level a real sense of progression.
As it plays right now, I'd have to argue for rejecting this level. It's got a good premise but it needs some work.