While the game looks great, without a tutorial I unfortunately just don't understand what's happening, what actions I can take, and what my goal is. I won't rate the game yet because I essentially haven't played it, but you want to explain how the game works, I'd love to go back and give it a try!
Edit: I was able to retry the game and I can see the mechanics/idea of the game much more clearly. I think an in-game tutorial is still necessary as I was still confused about a couple small edge case mechanics. Still, the game looks great, the idea is there, and I think with some polish you could have a great game on your hands! :)