Pretty good
None too shabby. I like the road system and the different directions of different factories. When it comes to different levels where the exit route is in a particular direction it allows for quite interesting base building.
Overall the gameplay is rather easy. It's pretty basic and linear and it does allow for only one action - building and upgrading factories. There's not much else to be done. EMPs and Healths aren't really necessary to complete the game. But aside from that, there is no other interaction in the game and so the gameplay becomes bland after a while. Once one has built enough factories to keep the enemy at bay, it basically becomes a waiting game for the resources to come in and the beef up the units.
What it needs is a tad more interactivity in the battlefield. Maybe some 'hero' units that can be summoned at a particular price or a temporary shield powerup that recharges over time. Research facilities instead of all factory buildings. More diversity in the gameplay will take this a long way.
The gameplay moves along rather slowly too. Because the enemy also upgrades at a steady rate and upgrade costs are a little on the high side relative to amount of money earned, it takes a while before my army strength is enough to start damaging the enemy base. It's not difficult. It's just slow. It's all a matter of time. Never once was my base actually threatened by an enemy attack, but I had to wait for the cash to roll in slowly and then upgrade certain things slowly. Since a lot of waiting is involved, there needs to be a speed up button or something. Not necessarily speed up the entire game, but certainly a 2x or 3x speed button for those tedious waiting periods.
I'm comparing this to the likes of Colony and Sea of FIre because the style of play is pretty similar. Those two have a much larger interactivity when it comes to the actual battle. While this game does offer some fun, it doesn't sustain it well enough due to the slow and linear gameplay.