Quite the experience!
I thought the dialogue was very well written and funny. The blend of fantasy and modern military weapons was amusing too. I liked the general aesthetic, although some of the terrain was a bit scuffed (the camera clips through the ground at one point). I really enjoyed the weight behind shooting the sniper rifle, was very satisfying to use.
For improvements, I think you could adjust the attack animation timings (either make the players shorter, or the bosses longer so that you can tell when they are about to attack and have a chance to dodge it). Also, I found that the difficulty was a bit off (the first boss was the hardest imo).
Very ambitious game with lots to like. Well done to you and your team!