Flag Shift
Your feature flag controls reality. SPACE or tap to toggle it, the world flips between its ON and OFF states. Don't die.
Roll your own run
Tune the run, pick a seed (same seed = same level, every time), then hit Share this setup: send the link to a friend, or paste it back to whoever's tuning the game to lock these values in as the new defaults.
How to play
You auto-run. The level exists in two states at once, flag ON (cyan) and flag OFF (violet), and only one is real at a time. The faint ghost tiles show the other state. One button toggles the flag (SPACE or tap): when the floor ahead is missing, blocked by a merge-conflict wall, or covered in bugs, flip to the state where it isn't. Toggle a beat late and a forgiving snap might still save you. Mid-air.
Endless is the score attack: one life, distance in meters, it speeds up and does not stop speeding up. 2 Flags is the hard mode: a second, amber flag (X, Shift, or tap the right half of the screen) controls full-height amber gates, independent of the cyan flag's ground. Missions are five fixed levels with lives and checkpoints that introduce each trap one at a time. Roll your own opens the slider panel: tune speed, gravity, forgiveness, traps, lives, and the level seed, then share your exact setup as a link.
Pros: hold F, →, or the ≫ button to boost through the easy parts, distance accrues just as fast, and so do mistakes. There's a fullscreen button (⛶) on the game, and the soundtrack is synthesized live in your browser, no audio files were harmed.
Frequently asked questions
What is this?
A free browser arcade game by ShipSilently, a feature flag platform built on Cloudflare. The whole game is one mechanic: toggling a feature flag swaps which version of the world is live. That's also, roughly, our day job.
Why did a feature-flag company build a game?
Because the toggle is genuinely a great game mechanic, and because "ship the new state instantly, roll back instantly" is easier to feel than to read about. Also it's fun. Mostly it's fun.
Is my score stored anywhere?
Only in your browser's localStorage. There's no account, no tracking of runs, and the share link just carries the number you chose to share. A global leaderboard may come later.