Hello, sorry for not replying sooner. I suspect your problem occurs because I've only provided a 32-bit build but you have a 64-bit system. It should be possible to get it to run regardless with some fiddling (you could try this from Askubuntu, iirc that's what I did to make it run on a 64-bit Mint install), but I will try to upload a 64-bit linux build ASAP. When I made the game I didn't realize that 32-bit backwards compatibility wasn't as seamless on Linux as it is on Windows, and I have sadly neglected this game lately.
EDIT: I have published a 64-bit build of the game, completely untested so far. Please let me know if it works! :)