The artwork is so cool! Like others have said already, i really enjoyed reading the backstory to the imperial squirrels, love the link to a faraway galaxy... ;)
Really like the Shellbreak mechanism, adds a really interesting interactive element for other players to interfere with this faction.
Might just be me, but the card draw seems a bit OP.
Really cool design! Satisfyingly huge acorn cannon. Would be fun to have this monster lingering in the forests during the game!