I like this game but it happens to me that it was too hard at beginning because the platforms feel so slippery. After a few times dead on second platform, I managed to get a grip of the control and feels the fun of the game.
There seems to be a lot of enemies and platform types, also rocket powerup rocks. Unfortunately somehow I feel that the platforms randomized too random, instead following a difficulty curve, once I met the caveman right in beginning.
Still a nice addicting game though :) .