What a massive improvement over BDP! And I LOVE BDP! The battle mechanics are so much smoother! The underground gang is such a fun way to start! The train is so cool! That's as far as I've got just yet but I want to play all of it!
I'm sure you're working on building more content and smoothing out the content you've got already. If you're looking for suggestions:
The constantly moving sprites are a bit odd at first. I didn't notice them after a bit, but when the game first started it struck me. I don't know what your code looks like at all, but maybe the sprite animation taking place only when the sprite's speed is > 0? Idk. I'm firing blind there.
The face switching mechanic took me a bit to figure out. I think if I hadn't already played BDP I might have assumed you couldn't use the new faces yet, because I tried all sorts of buttons in the menu before I sorted out you had to have the cursor on the face you wanted to add instead of the face you wanted to replace. Not sure what the answer is there. Realized I was being dense by the time I figured it out, but just pointing out it took some experimenting.
Same topic: I think the stock would be easier to use and may give a greater sense of mystery/discovery for the player if it started with only faces that you own (or have previously owned) and new faces were added to the stock page once you pick up that new face. Or maybe they're all greyed out or something until you've found one.
One more stock menu suggestion: Categories would make that easier to navigate. Instead of scrolling through each iteration of the attack face, just have 1, and maybe an icon showing how many attack faces you have in that "box." Select it to open and then you can scroll though the different levels of attack faces?
Last one: The two different buttons to fast print text and skip text entirely was a bit awkward (to me). I'd vote for either instant print all text and have a skip button, or instant print and then skip with the same button.
Sorry for the book. I absolutely LOVE what you've got here. Hope the suggestions come across as constructive. This project is flippin' amazing! No lie! Good luck! Looking forward to buying it!