Do we have to use the Z key? Can we change the key to any key we like?
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You can modify line 218 and at "if (Input.isTriggered('ok'))" you can replace "ok" with any of these inputs:
ok – Z, ENTER, SPACE
escape – X, ESC, INSERT
shift – SHIFT
tab – TAB
control – CTRL, ALT
right – RIGHT ARROW
left – LEFT ARROW
up – UP ARROW
down – DOWN ARROW
You can also add a line like "AudioManager.playSe({name: "YOURSOUNDEFFECTHERE", volume: 100, pitch: 90, pan: 100});" in the same section of code and you can make a sound effect play every time the player button mashes to give better feedback.