For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:przem:app/openSUSE_Tumbleweed/home:przem:app.repo
zypper refresh
zypper install lamertetris
For 15.4 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:przem:app/15.4/home:przem:app.repo
zypper refresh
zypper install lamertetris
For 15.3 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:przem:app/15.3/home:przem:app.repo
zypper refresh
zypper install lamertetris