Did you *procedurally* animate those legs? If so, holy cow, nice work. Nice work either way. Climbing up stairs was slower, but was also really satisfying to see. I agree with an earlier comment - if you have some kind of combat scenario that took place on a hillside in a forest-y setting, this thing would shine visually so much.
The explosions from the 85mm rounds looked great - I think the autocannon would do really well with a more subtle tracer round VFX and a punchier (and louder) SFX. I'll also second that I found the autocannon more difficult to aim with - not sure why; it might be because the reticle was a little floaty, or sensitivity was high, or the bullets are actual projectiles - not sure which it was. I also noticed that if you initiated a slide, you could slide indefinitely by holding that movement direction - it'd be interesting to try this as it gets more and more dialed-in, as I think these kinds of movement mechanics + animations are super juicy.
Very strong start, nice work! The tutorial worked just fine as a game loop for submission purposes IMO. I had a good time just running around and clearing the vehicles. Of course, a real scenario would go hard. Best of luck, and great submission!