When you upgrade you Tripod apperance could change....for example when the laser is upgraded X amount it could turn red, then yellow etc....and have secondary weapons??? Great game keep up the good work! :)
Upgrades could be an idea...........But this is meant to be real.......WOW. How did they fight like that? They are brave, and without them we may not be here.....
Curse the power of being curious! Don't ever throw you plane backwards! EVER. Your browser WILL crash. It took me an entire day to get it up and running again..........