Are the puzzles free?

Yes, all puzzle levels are completely free — no subscription or download required.

How many levels are there?

The number of levels varies by game. Many puzzle games include 20–100+ levels of increasing difficulty.

Can kids play Chain reaction?

Yes, puzzle games are suitable for all ages. The logic-based gameplay makes them great for kids and adults alike.

Some levels are timed, others are relaxed. Check the game's top bar — a clock icon means there's a time limit.

I'm stuck on a level — what should I do?

Most puzzle games include a hint button or a skip option after a few failed attempts. Take a break and return with fresh eyes if the hint doesn't help.

Chain reaction

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In another galaxy, a small planet is the home of strange molecules. These multicolored molecules go crazy in all directions. Your goal is to create a chain reaction, to catch as much molecules as possible. Click somewhere will create an explosion that will affect all molecules in the area. Train your brain with satisfying puzzles that challenge logic, spatial thinking and pattern recognition — all playable for free, directly in your browser.