the rar has a folder with only an EXE. To run the EXE, you need both the EXE AND the .x86_64 file from linux version in the same folder. If you don't have .x86_64 file, the game won't work
that's odd
I even tested it in a virtual machine, it worked fine
but I will fix it nonetheless, maybe it's because I embedded the pck file in the exe