SHMUP Creator

SHMUP Creator allows you to make the Shoot 'em up of your dreams!
As fun as a game, it is very simple but powerful enough to make professional-looking Shmups. Place your enemies with the mouse, create your bullet patterns, press a button to play, then share your games with your friends!
https://store.steampowered.com/app/1289520/SHMUP_Creator/