InfiniteShooter is a free and open source vertical shooter game for Linux, Windows and MacOS. It is written in GDScript and released under GNU General Public License v3.0. It is made in the Godot game engine. In the vertical shooters, the action is viewed from above and scrolls up the screen. In this game you need to shoot down all your enemies.
InfiniteShooter is available as a flatpak package from flathub. If you don’t have flatpak and flathub, then first install them. After that restart your system. Follow below link for flatpak and flathub installation tips.
Now in your terminal application (ctrl+alt+t) run below InfiniteShooter flatpak install command. It will install the latest version of InfiniteShooter.
flatpak install flathub io.github.pastthepixels.InfiniteShooter
After the successful installation of this game you can open it via below command.
flatpak run io.github.pastthepixels.InfiniteShooter
You can also uninstall InfiniteShooter
sudo flatpak uninstall io.github.pastthepixels.InfiniteShooter