A very short upward blip, the sound of a small character leaving the ground with more optimism than physics allows. Use it for jumps, hops, double jumps, menu confirms and any retro platformer moment. About a tenth of a second, so it never gets in the way.
triangle sweeping 330 Hz -> 720 Hz over 90 ms second layer: sine one octave up at 30% level for a bit of sparkle soft clip (tanh 1.6) so it sounds like a tiny speaker envelope: 2 ms attack, 70 ms decay