Well, where to begin!
The game is fantastically good! I truly, truly loved the environment, the AI design, the simplicity of the game and how it actually worked as it was done with UE.
I would say, the lack of ambience made the game feel less stressful and I think that void can be filled with adding some music, or additional sound effect. Other than that, I have no real criticism, this is fully functional, addictive game.
Great Job! Keep up the good work El Patron Games.