Guys... let me put it this way:
This game doesn't need a review! Just go & buy it without asking questions 
There is simply no room left open for criticism. This game is "The Ultimate 5 Star Game" released so far.
The objection of the game is to prevent the "fieldrunners" to reach the other side of the field. In order to do this, you have 4 types of towers which you can place anywhere on the field & they will automatically fire.
You got:
- 3 difficulty levels
- Outstanding graphics & gameplay
- A perfect help section
- The possibility to upgrade the towers
- The possibility to zoom in/out
As the developer has mentioned, there will be an update soon in which features like sound effects, more maps, more towers &... will be inculded.
Here is a little screenshot I took while playing

I turned the field to hell for the poor fieldrunners. I managed to go through the 100 waves successfully and scored 250825

If you got the game let me know how much you scored.