Hey brother you can make a shortcut to the game and add this in the target field under properties as a temporary fix -popupwindow -screen-height 1280 -screen-width 720 -screen-fullscreen 0
Just set the resolution to whatever fits your screen
So you wanna right click the shortcut that you made and select properties, when you do that the target should be highlighted already and it'll say something like "C:\Whatever\gacha_funsies_windows\windows\Gacha Funsies.exe". Paste -popupwindow -screen-height 1280 -screen-width 720 -screen-fullscreen 0 after the " and run the game through the shortcut.