Reaction Rush

Program a repeating sequence of arm moves that grabs atoms and bonds them into the target molecule, then runs that loop over and over. Once it works, optimise the cycle to produce more in less time.

• Lay out the arm's instructions to pick up and bond atoms
• Press Run to execute the loop and assemble the molecule
• Confirm it builds the correct target each cycle
• Cut wasted steps to raise throughput

• Daily puzzle, the same factory layout for everyone today
• Practice, fresh layouts to optimise

• Desktop: click to place and edit the arm's program, then click Run
• Phone & tablet: tap to build the program and tap Run

• Get it correct first, then optimise, a fast loop that builds the wrong thing scores nothing
• Eliminate idle moves and backtracking; every step you remove repeats forever
• Reuse the arm's path so each cycle flows straight into the next

Reaction Rush dresses a programming-and-optimisation challenge as a molecular assembly line, blending computational thinking with chemistry.

• Skills: optimisation, computational thinking, sequencing, problem-solving
• Best for: roughly grades 8–12 (ages 13+)
• For parents & teachers: sneaks real optimisation thinking into a chemistry theme.

Reaction Rush is a programming-and-optimisation puzzle dressed as a molecular assembly line. It's an original, free browser game made in-house for PlayPendium.

A free, original browser game on PlayPendium. No download, no install.