Play any type of Game at Y8.com. The biggest Game Collection to play free online. Flash, Unity 3D, Html5, Android, Java and Shockwave.
If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
Simple tower defense has just gotten so much more complex in this second version which will sure be a tough to try to beat, so take all the experience from the first game and best of luck to you in the simple tower defense 2 game.