I played one run so far, but I am going to play more later. I am going to write my thoughts so far
It was kinda crazy getting $22 artifact so early in the game, but I ended up saving for it.
I found passive skills and saving gold to be a really good strategy.
First run took me about 45 minutes. I got the last two skills for the last two fights. Wild Cards are really good.
I was able to save enough gold to re-roll my shop a lot to get more upgrades and chests.
I only played one Easy run, but the stats on the tooltip display 2s
I think you did a good job with automating skills which use SP. I think the game flow is really good. I honestly wanted to just keep going with the build I had. It did not feel like 45 minutes.