The game crashes when I used gamepad unfortunately. Very straightforward game though, I do love one-button games, they're the ones who mostly is simple to play but hard to master, and you nailed that feeling in your game :D
Here's the error it throws when I pressed a button at any point in time. I'm using a third-party nintendo controller and using google chrome browser. Hope it helps!
Edit: I'm not sure if the image is showing up lol here's the text of it:
Uncaught TypeError: Cannot read properties of undefined (reading 'pressed')
at readGamepad (index.html?v=1773614596:538:58)
at gameUpdate (index.html?v=1773614596:215:3)
at engineUpdate (littlejs.esm.js:247:17)