Yep, I'm aware of this but didn't bother fixing it until now. This game is made with Love2D, and what you're supposed to do is use a tool to embed your game into an AppImage where all of love2d's dependencies are included. When exporting the game to linux, I did not do that - I took a binary of love2d (without any shared libraries!) and concatenated that with my game content archive. It worked on my machine (obviously, because I already have love2d and all of its dependencies installed on my computer) but looking back, obviously this would not work for any other linux users, it went past testing because almost no one uses linux :P
Apologies for the inconvenience, I've known about this issue for a while but just didn't bother fixing it. Will do that soon.