Not a good game, but one I played to completion nonetheless. Some of these levels were bloodbath, with level 2 being extremely difficult for no real reason. After that, each level only took 1-3 attempts for me, and I breezed through everything else. But man, I was stuck on level two for a good while.
The controls are both stiff and slippery, you can't move diagonally and so must move in stair like patterns to reach the portal at the end of each level, and while the cancer cell pathing does allow for some fun setups to stall if you maneuver just right, the majority of the time you'll just miss the set up by what feels like a matter of pixels and you're left with no instant reset button and must be killed by the cells.
I wouldn't call the game bad, but it sure ain't good.