Some precisions needed: If bosses are immune to knockback, are they immune to the air effect entirely? Because Cutting Winds would not work, and I just don't know. Also, can a shot have multiple elemental effects? If not, which effect(s) has (have) precedence over the others?
You know what would be fun? Different colors for the HP bars. Like, blue for your party and red for enemies, so that you know if a low HP is good or not for that character. Also, it would be easier to track your character in big fights.
It's too short. Definetely needs AT THE VERY LEAST a x10 buy button, because "late-game" (like 10 minutes after you start, because you reached SR) it gets too long to buy employees. Again, waaay too short, because when the SR is reached you just need to fill the bar 50 times to get another SR level, and then the employees get waaay too slow. Needs something more.
Don't know if it's a bug or not, but it's impossible for me to buy Exchanges when I have just the right amount of coins for them. I always need to earn one more before I can buy it. (It still lights up as "buyable", but it won't buy it when I click) Nice game though!
There's a need for a confirmation button when you "leave town", that's basically a soft reset for those that didn't know. It's not that clear also, I think you should explain it, and what are the benefits of leaving town.
Could the numbers in the stats screen be condensed too? There are too many and since each line isn't equal it's hard to compare. Or at least try to have the numbers to start at the same point so that they're aligned.