Please stop clogging up the comments asking for badges, this game doesn't have Kong API yet and therefor CAN'T receive badges. Greg has spoken with TheSwain, who has expressed an interest in adding API to the game but not yet done so. Please repost this to keep it near the top so that we can stop this madness.
Guys, the easiesty way to beat the levels is....
Find a spot where they will pass twice. Place toweer
Uprgrade tower to lvl 2
Buy red gem, then yellow gem and put in.
Repeat with another tower
Upgrade both to level 3
You should have enough cash to build what you want now, upgradeing them or building more wealth towers is nice but remeber you will be weak against fire without any other towers.
2 trys for hard bage. First was ages ago and no badges back then. Easy if you use bird as much as you can on dino (they drop bombs). And remeerr, as long as you suvive with 1+hp you escape so let a few dinos through. And use arty for any that get through.