The trial version of the game may be fun. The rest of it is not.
Good: Gravity based game. Lots of cool times when you're being chased by falling blocks. Some memorable moments. Its a puzzle platformer! Cheap. Addictive until you get mad.
Bad: Its graphics (though graphics isn't the only thing) are bad. The main character has two sprites in total, because his jump is exactly the same as his walk. Tedious. HARD! Like really hard. There are moments when you want to throw the controller at the TV because of the horrible control scheme. The controls on wall jumping are horrible.
Overall: This game was a letdown for me. I liked the trial version, and I kind of liked the gameplay. The puzzles were addicting at some points. But there were many points where you had to be 100% accurate to solve some puzzles. Like you need to land in a hole, but the ceiling is on fire, and the walls are on fire. So you need to land exactly in the hole, but if you touch anything you die. And guess what? You have to jump over the scorching walls into another pit with scorching walls. Very hard. If you can withstand frustration than this game may be fun. Though I have played harder games (super meat boy, VVVVVV)