This is definitely one of the more unique games I've played. It's not the most fun in terms of gameplay, but it is definitely super innovative. The utilization of voice controls is something you don't usually see in Ludum Dare games, but it definitely works. I will mention that when I started the game, the targeting reticle was not present even though I had ammo, and when I said "pon", it made the shooting sound effect but I didn't hit an enemy, so I just had to shout "pon" a whole bunch to run out of ammo just so I could reload and be able to shoot things. Aside from that, it was an enjoyable and mostly bug-free experience. I loved the game's art style; the attention to detail on all of the assets was stunning, and it made them all enjoyable to look at. The audio works, and gives the player feedback whenever it is necessary, like when you hit something or when you've been hit. I also enjoyed the kind of in-a-mech-suit aesthetic you were going for here. Overall, well done! A solid 4-star game in my opinion!
p.s. If you knew your game didn't fit the theme, you could have opted out of the theme category. Following the theme isn't actually an official Ludum Dare rule, it's just a suggestion, a way to give people a starting point and not have them sitting around the whole competition and not knowing what to make. It's completely fine that your game didn't fit the theme, and it's still a really unique experience!