DESC: The world of MR. DRILLER is filled with blocks. He can dig to the left, right, up, or down, and his goal is to dig through the blocks to a target depth. However, there are several things that complicate this matter. Most importantly, Mr. Driller has a limited amount of air, but there are air capsules scattered throughout the stack that will replenish 20% of his air supply. Unfortunately, the capsules are usually guarded by X-blocks that take five button presses to get through, and they'll take away 20% of the air supply when they are drilled. To get rid of the X-blocks (or any color blocks), Mr. Driller will have to line up four or more of them into one row. With all of that in the way, getting to the bottom of the stack is no easy task; however, you can try with MR. DRILLER for the Game Boy Color.