I dig the game but it took me a while to understand the mechanics, even if I watched the tutorial. I mean it was good and had the right info to understand the whole game but in my opinion it would have been better if you did a separate tutorial for each unit because there was a ton of info to learn. Also I didn't understand which unit corresponded to the different models, I had to press the keys before it was clear but that made me lose the first game. The design of the tutorial was cool though with the writing on the floor.
The game itself is pretty fun and the 3D models look cool to me.
I see what you wanted to achieve with the music but the result was a bit weird. The base line was interesting but I didn't dig the repeated notes like that.
Overall it is a good entry and looks cool with some interesting design choices.