Complements

Bubble shooters live and die on one decision repeated hundreds of times: which color do I aim at. Complements changes what "which color" means. Instead of matching a gem to an identical one, gems clear when they touch their complement on the color wheel — red pairs with green, orange with blue, yellow with purple, black with white — which means the obviously-matching cluster of same-colored gems sitting in front of you is usually a trap, not a target. That single rule swap is doing real work: it forces a moment of actual color-wheel thinking on every shot rather than pattern-matching identical circles, and it doesn't stop mattering once the novelty wears off the way a straight clone's gimmick usually does.

A charge mechanic that actually shows up on touch

The other system worth calling out is the hold-to-charge shot: holding down before releasing grows the gem, trading precision for a bigger, more disruptive piece that can clear more of the board at once. That was tested directly on a simulated phone with a real touch-and-hold — the launch arrow turns green and a visible ring grows around the charging gem while the finger stays down, then fires on release. It's a small piece of design, but it's exactly the kind of thing that's easy to get wrong on a touchscreen (a held gesture that needs continuous contact tracked correctly) and it worked cleanly on the first attempt, with the same reliability on desktop with a held mouse click.

The rest of the control scheme is about as simple as this shelf ever asks for: tap or click anywhere to aim and fire in that direction, using LittleJS's ordinary touch-to-mouse handling rather than a virtual gamepad overlay. Repeated shots on both a phone and a desktop browser changed the board state every time, with zero console errors, zero page errors and zero failed network requests across every test run.

What's here, and what isn't

Four difficulty levels change the starting piece count (20 through 80) rather than introducing new mechanics, which is an honest way to extend a short session without pretending there's more game than there is. That's really the whole shape of Complements: one good idea, cleanly executed, without a second system bolted on to pad it out. The presentation matches that scope — clean glowing circles against black, readable at phone size, with nothing beyond the color-matching hook itself doing the visual heavy lifting.

Verdict

Complements is a small free puzzle game that earns its place by having an actual idea and building a clean, fully touch-functional interface around it. The complementary-color rule is a genuine twist rather than a reskin, the charge mechanic works exactly as well on a phone as it does with a mouse, and there's nothing rough in the execution to work around. It won't fill a long session, but it's an easy recommendation for a five-minute one.