Interesting game.  I like the theme. 

Defense is very strong and the AI seems to really stack defenses.  Consider a ramp up in difficulty.

Once the AI wins there doesn't seem to be a way to restart or exit the game.  

>What was the most frustrating moment or aspect?

On the game where I was about to win, the AI went and got stuck instead.

>What was your favorite moment or aspect?

I enjoyed moments when I could corner or focus on the enemy leader despite the defensive formations.

>Was there anything you wanted to do, but couldn't?

I wanted to try weird or funny moves, but was put off by the strength of grouped offense and defense combined with how much the AI worked to stick together. There didn't seem to be any way to get satisfaction from a rogue piece, making the abilities of the pieces individually less interesting. Doesn't matter so much what a piece does when it has to stick to the rest.

>If you could change, add, or remove any 1 thing, what would it be?

A standout notice or effect when a piece dies would help with some of the moments of confusion I had while playing.

Neat game! Having the movement grid displayed on each piece was great for planning out moves. It'd be nice if maybe the UI also had stats to show the amount of joint attack and joint defense when hovering an attack on a piece.