Those creatures look so cool ! Well done with the editor, I had a lot of fun with that !
The combat is not so fun though, it took me some time to understand how to attack properly, I took some time trying to escape the boulders because I didn't think I was doing damage to them.
I'm not sure the first person combat was a good idea, because the main feature of the game is the monster you create, and you don't see it in first person. Maybe some kind of autobattler where you add parts to the creature to buff it would maybe be a bit easier to do and less clunky.