IMO the bounciness needs to be taken out. Maybe just a standard collision? 4/5 It's like the Wii game.

I actually like this a lot good work!

Graphics were nice, everything seemed well-made, I personally am used toe WASD + Mouse controls and have no problem with that and the gameplay, although nothing new and rather basic, was certainly at least entertaining for a while.

First, two minor issues - and they really are rather minor and don't affect gameplay much at all.
When you bump in to a wall, your tank reverses direction completely generally. I found this to be a little annoying and didn't see any need for it. Ocassionally, if you got reversed in an attempt to turn round again you'll bump the wall and reversed again.
Also, for me, the game was mostly fullscreen-like apart from the my start menu was still visible, so it's as if the game wasn't set in fullscreen. Perhaps just my OCD tendencies, but seeing my start menu bar down the bottom of the screen seemed kinda' invading to the game and its atmosphere.
I didn't really mind too much that the game lacked music/sound, though suitable music/SFX would be fitting.

Now, perhaps I didn't play it for long enough, but is there an actual end to a round? Does someone win after a certain amount of kills?
Adding something on the menu saying how many rounds you have lost/won and how many tanks you've destroyed in total would add to its longetivity.

Generally a neat little game. ;)

Love the art! Was it all hand drawn, or did you use a little photoshopin' magic ;)

Nicely coded! The game has potential. I'm not a big WASD + mouse fan, but that's just me.