Bounce Lab

Bounce Lab is a side-view physics puzzle set in a friendly science lab. Each level gives you a ball launcher that stays put, a goal beaker and a small kit of parts: wooden planks, bumpers, trampolines, curved glass pipes, portals that come in pairs, fans, magnets, a bucket conveyor, bubble wrap that slows things down and rubber walls with their bounciness printed on them. Drag a part onto the grid, turn it freely with its ring handle, and a dotted trajectory preview shows where the ball will go before you press Launch.

Forty hand-built levels fill four labs. Chemistry teaches the basics with a rubber ball and a glass marble that chimes on every bounce, the Electromagnet lab adds fans, magnets, coils that switch on and off and a heavy bowling ball, Zero-G turns the gravity down until a beach ball floats, and the Night Lab is all glowing portals and shutters you have to time. Every level has three stars: reach the beaker, stay within the par number of parts, and ring the brass bell on the way. Levels are quick, retries are instant and undo takes back the last part, so it is a gentle brain workout rather than a test of patience. Nothing ever breaks: the marble chimes, the beaker wobbles and the lab robot cheers or shrugs.

When you want something without an end, Chain Reaction is an endless board. Each round you get one new part to add, every bounce in a launch scores more than the last, bells and test tubes add bonuses and landing in the beaker doubles the round. Miss three times and the run is over, and your high score is kept in your browser. It plays with a mouse and keyboard on a desktop and with a finger on a phone.