Awesome game! I’d like to submit this to Flathub to make it easier to get for Linux peeps; would you have any interest in being added as a maintainer there? I’ve done the small amount of prep work here, and would be happy if that could be merged upstream, as well. :)
For controllers (or all-mouse), you could use picking up the bug as part of the mechanic. Tapping a different button or key could do damage to one of the bugs on you, and you'd have to spam that button/key to kill the bugs off of yourself.