Very interesting game you have there. I like the approach you did where you fight classic in 2d and when your tank take damage you go into 3d to pick it up. To add interesting how you got it where the tanks and turrets where in place when you go into 3d mode. Very interesting. I like the graphics you used for the game. Few things is maybe for the instruction have it where you have to hold e to get in and out of tank. I kept pressing E and didn't work so bit confusing. Also might want to mention to click with mouse to get part as when it says click not sure it was referring to. Also this happen twice but had it where when i got destroy and i restarted the game, the turret on the tank got stuck and would only point in one direction. Had it happen a couple of time but then it stopped. I also encounter a z collision as well.
Other then that, great game you have here :)