Well, even if you think Boomshine is fine just as it is, you'll want to check out Linkaball from UK developer OMGames. Rather than attempt the futile task of beating Boomshine at its own game, Linkaball takes the gameplay in a new direction. Each level starts with a number of colored balls bouncing around the screen. Click the mouse to place a single white ball. If a regular colored ball strikes a white one, it starts a chain of that color; any white balls or balls of the same color that strike the chain are added to it. However, the chain – and your precious white ball – is destroyed if it is struck by balls of any other color. After a few seconds without any new collisions, the chain will break apart and all of the balls in it turn white. The level is complete when the required number of white balls are created.
"Now hold on!" you may be thinking, "That doesn't sound very controlled to me, and didn't you mention something about strategy?" Well, Linkaball does offer a number of ways to interact with the field of bouncing balls. Unfortunately, utilizing each one subtracts from your score, some more than others. The cheapest and least reliable method is to click on the field of play to generate a field that repels the white balls. The field doesn't do much when all of your white balls are tied up in chains though, so OMGames have provided a number of power-ups, usable once per level (for a more substantial price, of course). These powers are gradually given to you as you pass through the game's 20 levels.
So where's the strategy? The strategy is a lie. Well, sort of. The repelling field can sometimes be used to increase your score by maximizing the chain length, but you run a higher risk of collision with a different color. Apart from that, the powers are not at all cost-effective, and there's no penalty for restarting a level, so if you restart often enough, eventually you'll hit a configuration that maximizes your score without having to activate any powers. Realistically, though, few people possess the patience or the free time to wait for that perfect setup, so the power costs factor into some important decision-making about the trade-off between score and patience. Of course, if you're just trying to get through the game with nary a care regarding score, the powers can be very helpful, yet they still cost enough that you'll have to be prudent in their use.
The collision sound effects are quite soothing, though I recommend muting the music (unless you like 6-second loops). This provides a decidedly Boomshinelike feel to Linkaball, yet it is in fact markedly different, right down to the basic gameplay dynamics.