I really liked how creative this game was. I just kept getting the sense that a lot of detail and effort was put into creating the enemies. It was hard for me at first, but I got used to it. It's mostly because there are so many cool effects going around like how everything explodes. Whenever there's green air, I think of farts. It's just a funny concept for me.
The music is also very well done. Apart from having great technological tones, it's nice to see it get triumphant. It's also the kind of game where you can really take your time. It may take a little bit to get into it, but it's worth it. The most annoying are those little envelopes as I have to kill every single one of them.