Tap the game to open it fullscreen. On a computer, Esc exits; on a phone, use the ✕ button.

How to play

Watch the colours light up and repeat the order by tapping the four colours (or use keys Q, W, A, S). Each round the sequence grows; there are six rounds, and one mistake ends the game.

The story behind it

In the Norse sources, Heimdall guards the Bifröst bridge and has a horn, the Gjallarhorn. The colour sequence is made up for the game. Read the story in Heimdall: the watchman who hardly sleeps and guards the rainbow bridge.