itch.io

Run Linux exclusively but, love the game so much just bought on Steam to support the developers.
Good news.  A quick test using Steam Proton and the game runs with less CPU overhead than other verified Proton Games (Bejeweled).

I was able to drop cpu utilization from 250% to little above 200%

I have a 4 year old gaming rig (4 core intel, 1080gtx)

By capping the FPS from 60 to 30 and changing resolution from 2k to 1080p.  With low paced nature of the game and art style cannot see much of a difference.

Steam > Settings > Steam Play,

Under Advanced:  Check "Enable Steam Play for All Other Titles"

same for me. I did notice intermittent flashing on the end game screen.

Wasn't sure if that was intentional nag effect to say go buy it?

Also, same as Joel B with the mouse scroll.