Most everyone in this manga has an extremely punchable face.
Except the women, so that's every face except one.
(The artist can only draw one girl face, is what I'm saying.)
Bonus points for having the MC gleefully commit technical warcrimes to solve his problems, and for establishing an actual working relationship with the contemptible pig-faced noble instead of, y'know, crushing them immediately or having them commit a foolish blunder and self-destructing. That's novel.
Penalty point for not actually doing the math on the 'blimp rucksack' idea, you'd need like 20 m^3 of volume to make a difference, which would be extremely unwieldy. Still novel, though.
Overall, 7/10 at first glance, but the author might well be capable of more.