To all having a problem on level 9 it is because your gun was unequipped on level 8 so just re-equip it. Yes it is a bug, and yes it is annoying, but that doesn't mean you should give it 1/5 for one bug...
there should be less items and more money after battles, I have way too many items and there is no need for more than one of anything so it is kind of a waste and selling everything is annoying
i completed the last badge but for some reason it wasnt registered so I had to do the whole thing again! It was much easier the second time though, I played through the whole thing on 200% speed. All you have to do is build 3 nukes next to each other with 4 big damage+'s that affect them all.