ONOFF
- Is ONOFF free?
- Yes — 100% free, no payment.
- Download needed?
- No — it plays in your browser.
- Works on mobile?
- Yes — phones & tablets, full touch.
- Session length?
- About 5–15 minutes.
- Players?
- Single player.
A two-tone puzzle-platformer where one tap flips the whole world between two dimensions: solid platforms in one layer turn into deadly spikes in the other. Run, jump and toggle your way to the star across 25 hand-crafted levels.
About ONOFF
ONOFF is a beautifully minimal puzzle-platformer made for the 13-kilobyte js13kGames 2018 jam, where the entire screen flips between two states with a single tap. A surface that's safe to stand on in the "on" world can turn into a wall of spikes the instant you switch to "off," so every level is really a timing-and-spatial puzzle dressed up as a platformer. No clutter at all: a blocky little robot, a goal star, a death counter, and a catchy synth loop the authors wrote note by note. Everything you see and hear is generated in the browser, the art being plain SVG shapes and the music and sound effects synthesized live with the Web Audio API, so there are no image or sound files whatsoever. I self-hosted it as a single offline file, stripped out the bundled level editor, gated the audio behind a tap, and added touch buttons so it plays nicely on phones too. Open-source game by Daniel Marino and Brad Dunbar (audio via TinyMusic by Kevin Ennis), used under the MIT license.
Unblocked Chromebook No Download Mobile Classic
How to play ONOFF
Tap PLAY to drop into level 1. Move your robot left and right, jump up onto platforms, and use the FLIP button (or Spacebar) to swap the world between its two dimensions. Whatever's solid in one dimension is deadly in the other, so flip at the right moment to open a safe path. Touch the pulsing star to finish a level and move on. Fall off the bottom or touch a spike and it costs you a death and restarts the level. Clear all 25 levels to win.
Controls
Desktop: A/D or Left/Right arrows to move, W or Up arrow to jump, Spacebar to flip dimensions, M to mute. Mobile: on-screen left/right pad, the up button to jump, and the FLIP button to switch dimensions. A gamepad also works.
Tips & tricks
- Look before you leap: scan where the spikes will appear in the OTHER dimension before you flip, not after.
- Flipping is instant and free, so use quick double-flips to slip past a hazard that only exists for a moment.
- Momentum carries through a flip - you can jump, flip mid-air, and land on a platform that only exists in the new dimension.
- Deaths only reset the current level, never your progress, so treat each restart as a chance to memorize the layout.
- On phones, plant your thumb on the move pad and tap FLIP with the other hand so you never stop moving while switching worlds.
Game features
- 100% free to play — no payment, ever
- Plays instantly in your browser — no download or install
- Works on desktop, phone and tablet
- No sign-up and no email required
- Built with HTML5 — runs on any modern browser
- Single-player — play at your own pace
Frequently asked questions
How do you play ONOFF?
Tap PLAY to drop into level 1. Move your robot left and right, jump up onto platforms, and use the FLIP button (or Spacebar) to swap the world between its two dimensions. Whatever's solid in one dimension is deadly in the other, so flip at the right moment to open a safe path. Touch the pulsing star to finish a level and move on. Fall off the bottom or touch a spike and it costs you a death and restarts the level. Clear all 25 levels to win.
What are the controls for ONOFF?
Desktop: A/D or Left/Right arrows to move, W or Up arrow to jump, Spacebar to flip dimensions, M to mute. Mobile: on-screen left/right pad, the up button to jump, and the FLIP button to switch dimensions. A gamepad also works.
How do you get better at ONOFF?
Look before you leap: scan where the spikes will appear in the OTHER dimension before you flip, not after. Flipping is instant and free, so use quick double-flips to slip past a hazard that only exists for a moment. The full tips list on this page covers the rest.
Is ONOFF unblocked at school or work?
ONOFF is a plain web page — no plugin, no installer, no app store — so it loads on a Chromebook or a locked-down school or office laptop the same way any other page does. Whether it opens comes down to your network's filter rather than the game itself, and there is nothing to install either way.
What kind of game is ONOFF?
ONOFF is a free action game that runs in the browser. A two-tone puzzle-platformer where one tap flips the whole world between two dimensions: solid platforms in one layer turn into deadly spikes in the other. A typical session runs about 5–15 minutes.
Embed ONOFF
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More free action games
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