Turret Defense Banon River

All the living things around the Banon river are going crazy for no apparent reason! They are very agresive all of a sudden.
Build different turrets and upgrade them to defend this place!

4 turrets, 32 upgrades, 3 difficulty levels and more than 48 levels to defend.

Its my first game and it shows a lot but I think someone could enjoy some hours on this game :)

I made everything myself except a few free sounds, also there is no music.

Lastly since im just starting making games, if anyone wants to give any kind of feedback I will appreciate it.