If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
You want my nuts? Just try and get them! Mr. Squirrel is no stranger to nut danger, and he is ready to pop any creeps who make a move for his nuts. Fierce mice join your battle as you upgrade your weapons and nut defenses. Unfortunately, the creeps get faster and badder, too. Lock and Load, Little Nutjobs!