Works well under Linux when launched via Lutris. It was tiny so I went into settings and activated fullscreen which made it larger (but not fullscreen), however it’s well large enough to play now and it’s a very enjoyable game
according to user @Baranik, they fixed this when they did it by editing the xres and yres value in save.txt. i haven't tried it myself, but hopefully that helps? it looks like other people have done it too, i think 4 is the generally agreed upon value to switch it to