I/O

I/O is a minimalist puzzle-arcade game about surviving by bouncing between two platforms filled with numbered cells. Each bounce reduces the value of the cell you land on; landing on a cell at zero ends the run unless you use a power to survive. Each run presents a fresh grid and a new challenge.

Plan your moves

You can redistribute cell values and use limited powers to keep the board playable. Every five stages, Split Mode lets you transfer half the value of one cell to another. You can also choose two powers before each run, each with a limited number of uses:

• Safe Bounce: survive one hit on a zero cell.
• Value Boost: double a cell’s value.
• Overcharge: double your score for one bounce.
• Zero Cleanse: turn a zero into a usable value.
• More powers are available.

Score and unlock powers

You earn score by surviving longer and bouncing strategically. Spend it in the Power Store to unlock power-ups for future runs, opening up more tools and strategies. The game tracks progression and offers endless, score-based play, with new combinations across runs.