For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:edogawa/openSUSE_Tumbleweed/home:edogawa.repo
zypper refresh
zypper install giada
For openSUSE Slowroll run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:edogawa/openSUSE_Slowroll/home:edogawa.repo
zypper refresh
zypper install giada
For 16.0 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:edogawa/16.0/home:edogawa.repo
zypper refresh
zypper install giada