Really fun mechanic, makes for addictive gameplay! I couldn't stop playing haha.
I did find a bug though in one of the yellow levels. I deleted a couple of my moons to reposition them but the moon counter didn't refund me. I had to quit and come back into the level.
The level design is really well thought out and I'm really surprised by how many levels there are! Must have taken a lot of time and effort to make these because they all seem very high quality (I didn't finish all of them but I'll be back to do it later). Great work!