Egmorn, Q and E scroll trough your weapons. So you can change to the minigun. Good luck with getting the trophy and good luck with learning how to read...
Defeat the spartans by: 1. placing a tesla with maxed dmg and fire rate in the middle 2. placing a maxed quake box on a side 3. placing a missle turret with maxed missiles and dmg on the other side 4. spend the rest on "Old Glory" and max what you can
To those saying it's too hard: it's RPG-ish, go back to an earlier chapter and farm gold to buy upgrades. It turns all bosses easy sitting ducks... except for the bonus levels, they're hard even with all upgrades. 5/5