There is no real point except watching things fall in different ways but make sure you scroll to the bottom and play around with all the different elements you can draw with.
This is the Japanese original. And this is their new "Hell of Sand". Weirder still. I think I'll stick with the first game.
And, from the same stable, a Cat Sledging game. Use "Z" and "X" to shift the cat's weight backwards and forwards in the sled.