errm, screwtype, you do understand the concept of recoil in firearms do you? This is normal of anything that goes boom on one end.
true, but the cannons should role backward, or - considering the wheels are blocked - slightly move upward, but not as much as they do now. Although I personally don't care about that. I'd happily trade those fancy 3D graphics for 2D sprites if the gameplay would match or perhaps even excell that of STW and MTW.