From the Developer:
Quick Fix: I forgot to pack the .pck file inside the main download! To play, just download the .pck from this link and drop it into the same folder as the game executable. Sorry for the extra step!
LINUX(.pck): https://drive.google.com/file/d/1EdONsefLsmBE8FbUSn0etaOzK5jXrMYT/view?usp=sharing
WINDOWS(.pck): https://drive.google.com/file/d/1Ng0aAQDIxY5lnEwYXzVSh7o9p9_iOt9t/view?usp=sharing