Hit the battleship with one of its own missiles.
You destroyed someone's sand castle for no good reason, you rude jerk.
You seem to have missed the point of this game. (100 kills without eating anyone)
Get past the first level.
Hit the battleship with rocks ten times in one game
Hit the battleship with seals ten times in one game
Defeat the battleship without using any explosives.
Destroy the mech
Kick the mech at least 20 times in one game
Throw the mortar shells back at the mech three times in one game