This game is an entry in the common category of "things-falling-from-the-sky games." And also "match-things-in-a-group games." Blocks will fall from the sky and pile up at the bottom. You can walk your character around on them and pick up/put down stacks of blocks by pressing [DOWN]. However, you can't climb up two or more blocks at once, so be careful how you position them.
Rearrange the blocks so that they make 4-of-a-kind in either symbol or color. Don't let the piles reach the top of the screen!!
Also, you can toss blocks off your head by pressing [UP], in case you get completely trapped. They'll come back down in the same place though, so act fast!