How about either a mode we can unlock using coins, like the maps. Make it expensive 5k coins or something to strive for. When you get the new weapon you start of by firing single ball bearing like shot at a target which make the pinball bumper sounds, ding ding ding ding, and you get some points, Upgrade to level two (larger ball bearing) and you are able to dislodge and even move a few / richochet the tanks a tiny amount (direct hits will wobble tank from side to side like a bell ringing) fully upgraded and bigger ball bearings (could be 3) make tanks wobble from side to side, moveing about 3 or 4 tank lengths depending on strength. fully upgraded direct hit from a bumper,,,,, starts multiball mode, which drops bumpers all over the sides and roof. If tank is hit direct then it is thrown around the screen bouncing off anything and everything til the energy is gone, they may not end up in the sam place,, like a bouncy ball. I think that it's important to reward those that invest huge amounts of time playing collecting coins. Whilst also introducing something that could be very amusing, random and rare.
