The base game is not bad, but several annoying mechanics get in the way and make is a frustrating experience. The lightning "balls" that randomly spawn are annoying as hell and require a horrible amount of RNG to get the exact right color to deal with. The targeting line is constantly off, usually pulling to the right an arbitrary amount that changes shot to shot, and the endless mode is horribly boring, with no interesting marble patterns or changes to the game as it goes.