Nice little plattformer. So the graphics came with an asset pack, but it's what you make out of it that counts, and the levels were all very well designed. (I got stuck in level 4, though).
I especially liked the fact that at some point when 3 of the big spike monsters fell down on you (right after the checkpoint in level 3 IIRC) there was just enough room to squeeze in between the spot where the monster crushed down and the platform incline, so you could take a dive and wait there for the monsters to retreat in order to jump up to the next part.
Oh well, the "green water" actually isn't. Water, that is.
The background loop was a bit repetitive over time though and could have used more variety...