The RPi needs ARM libraries that I've not seen included with any game. Additionally, the 32-bit libraries that Ren'Py provides as an optional download won't work with a 64-bit RPi OS, so they need to be compiled or, as the case with Manjaro ARM, provided by the distro's renpy package.
I'm not asking game devs to provide RPi builds - they have enough work to do - just pointing out that the game can indeed be played on a Raspberry Pi and it's quite easy for users to do. :-)