The block-breaker game concept may be grossly overdone, but there's no denying the therapeutic feeling of busting blocks with balls. Unlike the simple and ad-riddled versions that you'll find on app stores, Holedown adds a bit of a plot and depth to the idea. You're drilling through various planetary objects, and upgrading your tools as you go along. More enticing than the plot is the level of skill needed, and of course, the lack of ads in this paid game.
The main plot won't take long to get through, but the game has enough in it to keep you coming back to better your high scores on each level. It's an uncomplicated game that doesn't ask too much of you beyond aiming and firing, and there's a definite sense of joy in watching blocks getting bombarded by balls and counting down to their destruction.