Download Mubbly Tower
Mubbly Tower is an interesting tower defense game especially because you are not only required to defend a tower, but you will also have to build it. Mubblies are the creatures that will form the tower that you have to build and using them you will have to create a tower that is powerful enough for their king.
Wobblies are your enemies and they will come to destroy your tower after you finish. This happens because this is their hobby, thus their kingdom does not have any high buildings at all. You will earn money as you destroy the attackers and you can use the money in order to purchase more blocks.