Just look at that screenshot for a moment. Seriously. How awesome is that?
Seven is like that all the way through. By that I don't mean every level sports that same limited Madworld-esque colour palette... I mean it just looks that eyeball-frotteringly gorgeous the entire time.
The first level starts off with a hot-air balloon ride in idyllic suburbia. The second level's madness you can see above. The third takes you into outer space. And so on it goes through seven stages, leaping from one lunatic location to the next, each level tasking you with just one thing: collect the star. Seriously, it's awesome.
Oh... and DO NOT hit "H" to read the help screen. I think it spoils it all too much.
Seven [Makibishi Inc.]