i no the last level (my friend showed me) so spoilers spoiler spoilers!!!
jump away from the boss whenever he fires his "shoop da whoop" lazer and duck when he fires his retro mario bros. bowser flames. Then you need to reflect his lazer by spinning (hold f7 and ctrl for charge up spin move) and repeat untill he dies. then, hopefully you will unlock the bazooka helicopter attacthment and you have to defeat 300 of his evil "koo- alas" and a final "scorparilla" to unlock the "just chatting II" concept art and sneek peek of the new PS3 game "just chatting- the complete trioligy"!!!
so anyway, when the bridge falls of the cliff, there really is nothing to do. all i have in my inventory is the lvl 1 gun and a peanut that farts when you click it. WHAT DO I DO??