itch.io

https://packages.debian.org/bullseye/supertuxkart

There is the graphical setting preset (1-6) you can change to lower one

Can you try lower the graphical quality?

This seems like driver bug or out of memory in your graphics card

Or you can try edit config.xml in the directory:

• %appdata%\supertuxkart\config-0.10 (windows)
• ~/Library/Application Support/supertuxkart/config-0.10 (mac)
• $XDG_CONFIG_HOME/supertuxkart/config-0.10 or ~/.config/supertuxkart/config-0.10 (linux, and other unix based systems)

change force_legacy_device="false" to force_legacy_device="true" and restart stk and see if it helps