This is a marble shooter with a system for buying power up improvements. Like most marble shooters, it drops power ups that you must catch,but it also drops coins to catch. The coins can be used at the shop between levels to do things like cause the ball to shoot faster or more accurately. There are also targets on each level that must be shot with the same color ball in order to finish the level. This game is the first time I've run across these elements. It means you're doing more than just shooting the ball. You want each coin to invest in future levels and the sooner you shoot the targets the fewer chains of marbles you have to deal with.