The visuals are good and the beast realm setting makes a lot of sense. I wish there was more!
I found it a bit difficult to understand the game. Being in a straight line with the pincering units to me reads like "being on the straight line passing through both pincering units", but it seems like it's enough if they are in a straight line to any of the two pincering units? Or even any units participating in the attack? (Not just the pincering units?) I accidentally activated like half my arm one turn. and I have no idea how that happened. Are straight diagonals also straight lines?
The tutorial doesn't really teach you what constitutes a turn, since there is no enemy movement to break up your turns. I thought I might be able to move all my units until I ran out of meter, but you can only move one unless you use the swap mechanics?
This is the first game like this that I've played where the path you drag your units between the initial and final square matter, so that's interesting.
Since I have no idea how the enemy will move, it's hard to have any long-term strategic goals. I can only think about the current turn since I have no idea what the board state will be after the enemy moves.
Despite not understanding the game, I won, so it was a bit unsatisfying. I probably learned more about the game by writing this and reflecting on my experience than by actually playing.
It probably is a polished experience if you're already familiar with terra battle, which seems like a sensible thing to priority if you're a terra battle player yourself. Hopefully my comments can help you understand how the game might feel for a new player. Good luck with further developments!