Unfortunately I was unable to properly play this, in both the web and downloaded version it just randomly kills me resulting in a game over within the 2nd - 3rd screen change. The bonuses seem to just change sporadically with little rhyme or reason often turning from good to bad just before you step on them, which I assume to be a bug.
In terms of what I could see, the artwork is overall pleasant, the slime character is cute and the music good. The environment changing with your size is a nice touch. Just a shame I couldn't play further.