I completely understand the position you're in. In fact, I had recently started working on my own Star Fox clone in Godot (I almost didn't when I saw you were working on one, but I figured two people might not approach it the same way (we should trade notes about it at some point!)), and I know how easy it is to get stuck on one thing for so long that you don't know how to move on past it.
So: keep it up! Ex Zodiac looks like it'll be a lot of fun to play!