I also installed the Cartridges app from Gnome Circles. Shows me Steam games and Heroic games too if I recall correctly. One click to launch. 😊🏁

Of course if you're running a launcher which can read .desktop files, I think it's faster to launch by typing.

I'm using the Noctalia launcher, so I just go Super+R then start typing "ro" followed by Enter and then Rocket League starts. Pretty fast.