For a tank game it's a really fun tank game. Your tutorial do a great job of explaining the mechanics.
My only gripe is on how high is the mouse sensitivity by default. But that got remedied by lowering it in the config menu.
The crusader tank is really joy to drive. I even manage to do a trick of driving off the last level platform to land on the wall. And drifting everywhere!
I didn't find much use for the 90mm other than "Haha big gun goes BOOOM!"
I really enjoyed my time with your game, thank you!