Maybe, maybe not..You can do pretty much anything with godot (due to it's open source license),so it's not a case of "Can I?", it's more a case of "Should I?"In my limited knowledge of Unity, I think the two are pretty similar with child nodes being a sort of more advanced (in my opinion) version of components and the ability to make instanced objects (although in unity, you can only instance "prefabs", while in Godot, you can instance any scene file) are common ground that both editors shareThe biggest difference will probably be the scripting.Godot uses a python-esque language called GDscript, which is designed to work with the engine as closely as possible.Unity uses C# (although Godot should be getting support with the 3.0 update), and while the basics should be similar (I admit I know little about C#) there will probably be some differences)Also, something else of note is that currently the 3D engine sucks (another thing that will be fixed in the 3.0 update)Another thing is that due to Godot's unusual (but cool) emphasis on instancing, reusing and encouraging efficiency, some cool tricks that are possible in Godot may not be possible in UnityJust my 2 cents