Its an alright game, I see a lot of work has been put into it and I can see it will become a great product, it has potential, however, it still needs polishing and some optimizations.
I would recommend adding a few more graphics options such as V-Sync, and maybe make that graphics quality dropdown menu a preset, being able to increase & lower specific settings would be nice.
It feels a bit choppy even at 60 FPS but this could be my computer being bad. The gameplay is fun, you get to build your own fortifications and what not. You can also control vehicles.
Overall I would give it a 6/10 at the current state. If the developer manages to optimize the game a bit more, I will edit my review.