Edit: Oops, I missed these were supposed to be open source lol, sorry!

There are quite a few: Unreal has it, Construct 3, Clickteam Fusion, RPG Maker if you want to make RPGs,I think GameMaker Studio as well... There are lots that you can find with a simple search on the internet. I never really used them though, since trying to do anything more complicated usually ends up being harder in Visual Languages. In the end, the logic and thinking is the same as with text-based coding, it just has some more syntax that you have to memorize (which sounds intimidating, but isn't that hard). Godot is honestly great and the scripting language is pretty simple even as a beginner, so maybe you should give it another try.