I think it's a really nice model and I'm not really qualified to criticize as I'm sure you know, PetBom. ;)
But...
I personally think there's too many 45/90 degree angles on it.
I, too, think the barrel is way too fat - I can imagine the whole tank shooting off backwards after firing that baby! :)
Lastly, a practicality thing: Controlling the tank in a game would mean you'd have to turn the whole tank to the left/right in order to fire in those directions as it doesn't have a turret. Would mean you couldn't fire off to the sides while moving, too. Maybe this doesn't matter, though.
But...
I personally think there's too many 45/90 degree angles on it.
I, too, think the barrel is way too fat - I can imagine the whole tank shooting off backwards after firing that baby! :)
Lastly, a practicality thing: Controlling the tank in a game would mean you'd have to turn the whole tank to the left/right in order to fire in those directions as it doesn't have a turret. Would mean you couldn't fire off to the sides while moving, too. Maybe this doesn't matter, though.