Chain Reaction
One tap, then watch the cascade do the rest.
About Chain Reaction
Chain Reaction gives you a single decision per round: where to place one explosion in a field of drifting particles. Anything caught in the blast explodes in turn, catching more, and the round plays itself out from there. The entire game is the quality of that one choice, which makes it unusually calm for an arcade game — there is nothing to react to, only something to judge.
How to play well
The intuitive move is to tap the densest cluster on screen. That is usually wrong. A dense cluster detonates almost simultaneously, so the blast radii overlap heavily and cover little new ground. The better target is a moderately dense region positioned so the cascade spreads outward into other clusters — you are looking for a bridge, not a crowd. Timing matters too, because the particles drift: waiting a second for two groups to converge often doubles the result. Later rounds require a larger proportion of the field, which means placement stops being about the biggest immediate blast and becomes about reaching the far side of the screen at all.
How it is built
Every particle is an independent entity with position, velocity and an explosion state, and the cascade emerges from local interaction rather than from any global scheduler — each explosion simply tests nearby particles and triggers them, which produces the branching timing without anything coordinating it. Rendering uses additive blending so overlapping blasts brighten where they intersect, which is what makes a large cascade read as genuinely larger rather than merely wider. The whole simulation runs on a single canvas with no engine, and the particle count is capped to keep the frame budget intact on a phone.
Nothing is collected
This game follows the same rule as every tool on the site. There is no account, no leaderboard server and no analytics event carrying anything about how you played. Your best score is kept by your own browser and never leaves the device — clearing site data for this domain erases it, and nobody else ever had a copy.
It also works offline once loaded, because there is nothing to load from anywhere after the first visit. That is a side effect of the same design: a game that never talks to a server has nothing to be disconnected from.