Please put your games on steam
Why are people downvoting you? More people should know about KIRA games, and KIRA should get more money for the hard work
KIRA has several games on Steam, they know how to do it. Basilisk 2000 is only on itch.io because some of what the game does cannot be done on Steam.
Without spoilers, does that mean the game won't fully run correctly if I were to play it on Linux using Proton?
You should be fine :)
