You can do whatever you want with you game. Feel free to share it with everyone or sell it at any cost you want without problems. I would recommend this official article. As you can read there, the only rule is that you have to include a copy of the MIT-license that will apply to the godot parts, not to your game as a whole.
I'm not sure what you mean with your 'own personal creations in unity'. Nevertheless I hope I was able to make things clearer.