Interesting game. Balancing is ok, but QoL needs some work. I think it's good enough for a jam game.
I have encountered 2 problems when playing:
1. Different units of cash cause confusion
This game switches between 2 units of cash: 1$=100c
This caused some confusion for me when starting. It soon becomes irrelevant when I have more money.
2. Switching of bulk buy
This game have multiple tiers of items, and need to be crafted in different amounts. Fortunately, the game has percentage ratio for bulk buy. However, this also has problems: 10% is too small, and max all is too big for some items.
I think a 50% option should be good enough.
I even once accidentally used up all my phliosopher stones with a misclick at buy max. This caused my progress to slow down a lot, especially since the phliosopher stone is a static layer, and I can't easily earn it back. Without the upgrades I was supposed to buy, it's tedious for me to grind back to the spot where I could earn more prestige points. This caused a lot of frustruation for me.
I think the 50% is still useful for this case: have it spend at most 50% of prestige points when buying multiple levels. This will be convenient, and also without the problem of misclick.