ONE BUTTON // PROTOTYPE

Short challenge levels · automatic running · one button to jump and throw
Level1 / 20
Time0.00s
Bonus0
Score (est.)—
Best local—
Deaths0

One-button controls

Space / click / touch: first press starts running only.

Hold: jump higher. Release: smoothly end the powered jump.

Press again in the air: throw one arcing projectile. No aim preview.

Once you die, the level instantly resets. Press to try again.

Grid (G): toggle the 32px construction grid with 16px half-step guides. Hidden during normal play.

Physics (P): compare original physics with grid-calibrated jumps and throws. Switching resets the current attempt.

Editor (E): build levels on the grid, then select Playtest to run them. Press E to return to editing.

Prototype rules & symbols

Red: lethal obstacles or enemies. Gold: switches and projectiles.

Mint diamonds: optional touch-to-collect bonus (temporary choice).

Time plus optional points produce a test score. Best results are saved only in this browser, separately for each physics mode; there is no online leaderboard yet.

Grid physics targets: ~3–5 cells jump height, ~5.5–7.5 cells jump distance, and ~2-cell-high / 9-cell-long throws (measured at equal heights).