What is with the Power Matrix?
First off, the power menu doesn't make any sense. In the top row, tank has a 100% advantage to infantry, same tank on the left column have 50% advantage to the infantry.
The left side ALWAYS has a smaller advantage than the top row. Then you have a 3rd symbol that's not explained and makes no sense. The navy ship has 100-125% disadvantage to air on the left column, but the top row, it has no arrows.
Does that mean that the red ship cannot be hit by air, or it can't hit air but the green can? I honestly know what it is trying to say, but it's a flaw with the "Power Matrix".
Second You can beat levels with just your main gun. I never built any units before finishing every upgrade in the game, and when I did build them, I never needed them. I can literally spam my main gun and still profit off the level, so by the time I do need units, I can produce them infinitely.
The units are way to generic, and the weapons just don't really feel like they should. Maybe if you could only use them on your half of the map, rather than your enemies doorstep, it would feel better?