Flatpak of the Moe Mansion build which adds unlocked framerate among other things.
Full feature list can be found here
Its build with Discord Rich Precense, ask to join is not tested.
To install have flatpak setted up and download from latest release.
wget https://github.com/Lonsfor/org.srb2.SRB2Kart/releases/latest/download/org.srb2.SRB2Kart-moe.flatpak
flatpak install org.srb2.SRB2Kart-moe.flatpak # use --user for user install
Your content folder will be in ~/.var/app/org.srb2.SRB2Kart/.srb2kart
to build and install have flatpak setted up then run
git clone --recursive https://github.com/Lonsfor/org.srb2.SRB2Kart.git -b birdhouse-build
cd org.srb2.SRB2Kart
flatpak-builder --user --install --default-branch=birdhouse --force-clean build org.srb2.SRB2Kart.yaml