I really like the escalating advantage/take +10% forward system, and how you can give it up for a retreat. Really clean and simple, pushes gameplay towards certain tropes.
Like many rules-light systems, you'll have to fill in the blanks with your own preconceptions. e.g. how does initiative work, and do NPCs have similar stats to players? The "take the 10s digit of a successful attack, this equals damage dealt" would suggest this, because The Black Hack-style "roll over player's stat to hit" would produce only really high damage numbers.
edit: I missed the ref booklet, which answers this question. NPCs deal static damage on a failed roll by the player.
(this isn't meant as a criticism--there's necessarily gaps when a game fits onto a single-sided A4 sheet. Just a forewarning for people not sure what to expect)