The core mechanics feel quite potential, expecting your could keep working on it!
I do find the strategy place really limited. Most of the time, there is just not much to do, in both the rolling stage and the building stage. It seems like what I can do and what I should do is crossing my fingers. For a rogue-like game, I do hope my thoughtful consideration and careful playing can hugely affect the result.
However, I do not know what should be a better way to implement the idea. After all, the flavor of the game is the SLOT MACHINE, which just means randomness. Apparently, exploring a good balance between strategy and randomness would endow the game with more fun and depth.