So, played it for an absurd amount of time, and running into severe progression issues.
1) Only being able to have one Sigil active is a royal pain. And you can't deactivate it mid-run.
2) Job speed is capped at double the progression cost. So farmer, needs 5000 points, and it caps at 10,000/s. This makes many of the store prices unobtainable, even with Gold Sigil active. Anything above 5,000 gold, you won't ever be able to get, and even at 5,000, its hard to acquire that much money.
3) Earning perk points, is a really slow slog. I'm at the point where the next upgrade costs 30-50 points, and I can only earn like 14 per run, and that takes like 30 minutes of playing to get that.
4) Attack speed beverage is pointless at +10% speed. It doesn't do anything noticeable when our base speed is 0.2 attacks per second, jumping to 0.22 attacks per second. It costs 100 gold a pop, and lasts for 30 seconds (90 with upgrade).
5) Anything beyond the training dummy's is too hard to defeat. Even with rank 8 vitality and punching, and all the 20 point or less perks active.
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There is lots to like about it, but I think I'm going to quit now, that I've achieved most things, got to rank 21 thinking (23 caution), and got a lot of the perk talents.