How do you beat bunny invasion 2?

u go through the levels and try to save ur money to buy upgrades.and at wave 30 save ur money for the minigun.then as u get more money per round get the grenande launcher next.[the minigun is super fast]upgrade them both FULLY!when u get to wave 60 when the bunny comes shoot it in the HEAD until the minigun overheats.then shoot him with the grenade launcher on his LEGS AND FEET till he makes a auuuuuuuuuuuuuuuuuuuua sound.THEN REPEAT when he does it three times u win.and u can continue playing afterwards.any level u want to try to get everything.[WEAPONS TROPHYS UPGRADES AND MONEY!!!!]