Hey, dont be afraid of criticism, there are real Jedi hobbyists around here you can learn a lot (not me).
It looks well built overall, but somethings dont look right. If you are going to weather, rust the wheels, then you need to weather the complete tank. I see the bottom dirtym but the top part, perfectly clean as well as the figures look to bright and clean. So, either completely clean or completely dirty. But thats just me, keep exercising building more and more.
Good work!