The Linux binary is contained in an additional zip file inside the main zip file and you'll have to extract both to run the game. From there you can either run the shell script or the binary directly. You may have to manually mark those files as executable.
- Download "X-YZE_LINUX.zip" and extract it.
- Inside the extracted folder, you should see 3 files: "_CREDITS - X-YZE.txt", "_README - X-YZE.txt", and "X-YZE_LINUX.zip". Extract that .zip file.
- Inside of that extracted folder, you should see 2 more files: "X-YZE_LINUX" and "X-YZE_LINUX.sh". You should be able to run either of those.
Retl / Ann mentions you may need to mark them as executable. I'm not a Linux user, so I can't tell you exactly how to do that. However, a quick web search on the topic gave me this result, which may be helpful for you: https://askubuntu.com/questions/229589/how-to-make-a-file-e-g-a-sh-script-execut...