For those of you who know Slyder then this game is very similar. For those of you not acquainted with the funny sliding ball, let me explain Balltracker - a different but very similar game. Your simple objective is to guide a small, yellow ball to the exit. However, you may only move by rolling into static blocks which then stop you. If you don't hit a block you go rolling off the screen and must start again from the centre. There are many blocks scattered about each level, so you must choose to roll into the right combinations to guide you to the exit. Each exit can only be entered from one direction, pointed out by an arrow. There are three levels of difficulty, some levels are easy some are much more difficult and take some planning out. What I like best about this is its stripped-down quality. Each level is simply a ball, some blocks and an exit. Also without thinking too hard you can slide around the screen and begin to work out which route is successful. The play is fast and each level increases in difficult by exactly the right degree.