This won't affect many people, but on request for accessibility, I've added a setting to allow playing the game with just the left and right mouse button.
It'll be a bit of a challenge to play some of the levels like this, but if anyone is up to it, the game now supports it.
Patch for Accessibility
Build and release context
Recorded Steam release date:
Within one calendar day of this post (UTC). The listed date does not establish an exact launch time.