Nice! I was wondering if would try something like this, but in the end, I takes me too long to create something entertaining even with a nice game-engine such as Unity.
So far I opted to play with Scratch Junior, as that
a) runs on my tablet
b) is simple enough for my kid to do most of the scene-building/programming herself :)
c) the block-language is simmilar to the one used with Lego Boost that we have as well :)
On the other hand, it is kinda limited, and we are only able to do simple point and clicks, so I might try Godot now, and see what can we make of it :)