I used the 200 starting crowns on Unlimited Building queue and it did NOT give it to me... oddly suspicious. Why should I buy crowns if using them doesn't work?
I was level 10 and was done with all quests (blame the RNG I guess). Adding things to do after 16 will just make it seem like a grind to even get to 16 if you're done much earlier.
Just uploading an update with an extra 12 encounters. These encounters can be replayed and will either give you a chance to increase a stat or reward you with cash depending on the level of the relevant stat. Hope it helps.
Yeah the "Final" mission is so easy compared to the infector battles I had to fight, but then again I may have just been unlucky as they always started right next to me. RNGs always seem to hate me...
The easiest way to reset your progress is to just right click and hit "Rewind"
Also for those who are having trouble, or just never played some of the games listed here, http://ayumilove.net/were-you-a-nineties-gamer-walkthrough-guide/ really helped me out.
I also ran into bigpeking's bug, but mine acted differently. I was on Wave 28 using the minigun when all the zombies froze on my screen. Wave 29 came around but no zombies spawned for the rest of the game allowing me to fix the truck without any enemies spawning.
The only real problem I see in this game is trying to fold one segment of the paper only. It will fold the entire paper whereas in real life I can fold just that section I want. Would be very helpful on levels like "Jet".
I just had a tower "blow up" on a Closed Path All Splitters level.
Apparently the mobs can glitch to go on the walls and kill your towers.
Image can be seen @ http://img855.imageshack.us/img855/71/bttd2glitch.png
 "Vinashi"){kind=icon}
 "The City of CaenArpegia"){kind=icon}
 "Clash N Slas"){kind=icon}
 "US States Word Scramble"){kind=icon}
 "Double Rogue"){kind=icon}
 "Space Hunter"){kind=icon}
 "Obliterate Everything 2"){kind=icon}
 "Pandemic 2"){kind=icon}
 "Arms Dealer"){kind=icon}
 "Avant-Garde"){kind=icon}
 "Bubble Sky"){kind=icon}
 "Were you a Nineties Gamer?"){kind=icon}
 "Dude and Zombies"){kind=icon}
 "Renegade Racing"){kind=icon}
 "Battle without End"){kind=icon}
 "Folds -- Origami Game"){kind=icon}
 "Bubble Tanks Tower Defense 2"){kind=icon}
Just uploading an update with an extra 12 encounters. These encounters can be replayed and will either give you a chance to increase a stat or reward you with cash depending on the level of the relevant stat. Hope it helps.