This game does have builds for Linux, but they couldn't be accessed until now. Sorry to all the Linux users who tried to play Solar Lander. I had known about the problem for a couple of months and tried unsuccessfully to search for a solution (couldn't find the right page in Steamworks). Finally, I contacted Steam support which pointed me to the correct page and I was able to implement the fixes in about 1 minute. Sorry it took me so long to fix the issue.