it installs the game in a local user folder. And i just tried it and screenshots work.
They are saved in ~/.local/share/classicube/screenshots
if for whatever reason you dont have permissions to the .local folder on your user i think you may have messed with permissions a bit too much. 🙂
try running ls -l ~/.local/share/classicube/screenshots
if it shows your user's name like this
then it should be fine
if it shows root you may have messed with the permissions too much and broken something on your system.
Source code
Please tell me what you think.
To install, go to releases and get the deb file. The game is installed under ~/.local/share/classicube.
This will not get you a working install on a raspberry pi It also now works on the pi.