A bit too simple...
Sometimes simple is a good thing.
However, in the case of this game, it was *too* simple.
In my opinion, there really needs to be more options for play. Maybe give the cliffdiver some special moves, or make different objects to dodge like pigeons etc.
The game is "ok" to play once, but it gets really boring really fast. Make the game differentiate at some point, make it become more difficult, I don't know, but it just isn't all that fun to play =\