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Accordion

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Accordion turns your phone into a playable accordion. The two halves of the phone are the two ends of the bellows: hold a key and open and close the top half to make a sound. The faster the movement, the louder the note. There are no points or timer; it is for playing freely.

How to play

  1. Put the phone flat open on a table and press ⟲ 180°.
  2. Hold one of the keys on screen.
  3. Open and close the top half like bellows. Sound only comes while you are moving.
  4. On a keyboard, A S D F G H J K play notes and Z X C V play chords.

Tips

Like a real accordion

In a real accordion the sound is made by air from the bellows passing through metal reeds; the keys choose which reeds play. The game works the same way: the key chooses the note and the bellows movement gives the sound. It is a simple, enjoyable example of using a motion sensor as a musical instrument.

What do you need?

Katla games run in the browser; there is nothing to download or install. The games read the phone's fold angle from its motion sensor, so they play best on foldable phones such as the Galaxy Z Fold and Z Flip. On a phone that doesn't fold you can tilt the phone with your wrist instead of moving the top half, and most games can also be played by tapping the screen. Motion sensors only work over a secure connection (https).

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