I had mousewheel implemented, but had to disable it because it also scrolled the webpage; I can add the middle-click though!
Ahh. I'm playing on the Windows itch.io app, which downloads and launches these games in a standalone client where scrolling isn't a problem.
Oh! Interesting. There might be a way to prevent the mousewheel functionality since I already found a way to prevent arrow keys scrolling the page but I'll need to investigate
