First off, I'm really hype to see a solo rpg submission! Solo rpgs have been getting a lot more popular and I think this is the first mecha one I've seen.
I also really like what info we get on the setting. It sounds like a cool, weird universe and it really sparked my curiosity and imagination. I also think it's a great idea to do military themes in a solo rpg by having the player write after action reports.
All that said, I do think the scenario presented is unfortunately a little bland. I feel like the sweet spots for this sort of thing are either offering broad narrative strokes or offering a lot of choices. The Hold the Point scenario doesn't do either, so it's a lot of dice rolling without feeling dynamic. I wonder if there is an opportunity to abstract combat into fewer rolls to move things along. Hopefully this is only an issue with the first scenario and there will be opportunities to add more dynamic play into the TBA ones.
Overall, love the concept, love the setting hints, and would love to see continued development.