Block Slider Puzzle Game
 

http://oos.moxiecode.com/examples/cubeoban/index.html

It's pretty hard but it only took me about 10 minutes to go through all 30 levels. Nice game to sharpen your mind or just waste time.

got stuck on 11

Hey, this is actually some fun, nice time filler while you wait for supper to arrive.

I'm stuck on 18...

Finished everything