Is that a 64-bit build? I'm getting an Exec format error in the terminal whenever I run the file Bitmaster/Bitmaster/Binaries/Linux/Bitmaster. I opened with the terminal to check that message too.
I have a feeling it is a 64-bit build. I did run into the same error message with a 64-bit Linux file (that I also got from itch.io). Do you have a plan for a 32-bit build?