OK, I played the first level :P

It generally looks nice, but here and there tiles are out of place and I don't like those hovering foreground lavafalls. I mean, real water/lavafalls don't move around constantly either. I think a instant-kill lava would be better too. The big fireballs seem to move a bit slowly, but that's probably because you wouldn't be able to pass them otherwise.
The level seems to be quite jazz-biased: it gets way easier when you have the posession of your uppercut (kill all those sparks with one move when they're all at the same place next to you) and helicopter ears (simply fly over those big lava pits). You might want to add a few invisible masks or winds to stop a Jazz-using player from doing this. Also, those sparks come out of the lava without any warning, which is quite unfair. You should always have a way to spot the danger and avoid or destroy it. One last thing: the blaster powerup at the start. I think you should put it in another place, because all thos ravens and sparks are way easier to kill with a poweredup blaster; Maybe put it in a secret area or something, it's way to easy to get it now.
The readme level sucks, but I've never liked readme levels, I prefer fancy html readmes >)