Suggestions
Unfortunately, that's kind of where the excitement ended. The controls are clunky. I would hold the button to shoot and then it would just release without shooting anything. I only did the first two levels because it was unpleasant :(
My suggestion is to:
1) give options to get into the cockpit and have a first person view.
2) make the game landscape mode and have two controls with a fire button on the right hand side. One control will move the robot, one control will look around, then the fire button will fire. This would make the game SO much better!
Just changing those two things would dramatically change how the game plays. Unfortunately I didn't give it a chance to get to the weapon upgrades, but I would gladly come back with changes! :)