Flash Element TD is a nice small game. It is similar to the Warcraft III Tower Defence game. There are basic towers, elemental towers and combo towers. To make elemental towers, you need to have wood which you get after killing the boss, first one comes at level 9. It’s a fun game and you need to have Fire tower (Upgraded to max) to reach a good level because of their high splash damage.
Try to play now... Have fun! (^.^)v