This is absolutely a perfect Dope Wars game! It does everything right, a lot of people don't 'get' what this game should be about but this is it. It keeps the same addicting gameplay loop as it's supposed to have, without a bunch of random fluff added to it.
I do like the short CYOA type of gameplay added in with the Castle, it provides some variation without distracting from that solid core gameplay loop. The Soothsayer is also a lot of fun.
It's also not easy, as it should be. The RNG feels the same as I'm used to, this is another thing a lot of clones get wrong. Looks like you studied/played the original one to keep this same vibe.
The Beastiary is a nice detail. Great job in keeping track of the average price bought.
The UI is clean and minimalistic as it should be. Love the ambient soundtrack and sfx.