Chobin is a good little action game where you have to work your way down a series of labyrinths by tossing discs (balls?) at enemies and clearing a path to go down the next staircase. Throw a disc down the stairwell and you can proceed. There are two special discs, one which can be thrown double the distance, and the other one longer still (maybe four times?). If you throw a ball into a wall, it will bounce back at you, so you have to be ready to dodge it. There are also a variety of bonus items to pick up along the way.

It is a game by Bothtec, who makes some pretty interesting games, so it's not surprising that this one is good. The game doesn't seem overly hard, you have to work your way from the 20th floor to the 1st, and I got to the 13th without too much problem and chose to stop playing.