This game is fantastic! I know how difficult it can be to set up an in-game graph system, so this game having so much content in a short time-frame is very impressive.
I don't usually play autobattlers so I don't know the genre well enough to speak for others, but in my opinion, I wish I could "program" units to fight a certain way. For example, target week enemies first, target low-hp enemies, fight at a distance, etc. I died against the demon lord because my character ignored one imp that was almost dead, and I ended up losing by a tiny margin. Again, I don't know the genre well, so playtesting with the target audience would be recommended.
I also didn't understand how the different menus worked, as there was no way to tell how many options I would have before the next battle.
Regarding block, block and chance to block seem to be different stats, but I'm not sure.
Finally, the shop menus could use a little tweaking. The scroll wheel moves the shop very slowly, some of the items are out of order in-terms of cost and/or power, and the shop items are too big in my opinion, which means I have to scroll a lot to see my options. I think 2 columns and smaller icons would help, but it also depends on screen size, so maybe a button or setting can be added to change the number of columns in the shop.
These are all minor issues, and I really enjoyed the game. I hope it becomes a full game. Great work!