The concept is to dodge obstacles, which fits nicely a relatively short game.
The graphics are simple, yet 3-D, which is okay, and the music is actually pretty catchy. The gameplay is what you'd expect from an "avoid" game, and it makes you feel accomplished when you finally manage to understand how to beat the level.
The only things I'd tweak would be the absence of sound effects, which could be a nice addiction to a small game. The restart button could also be a little more responsive. But other than that, it's pretty fun.