you should look over your overall design:
Have consistent numbering -> Cost are sometimes switching to shortend values (s,k, etc.), and sometimes not
make sure that it's easy to see, what the user is able to buy -> red text for not enough money or something like this
make for a faster entry -> drop the upgrade in the begining to be able to click... needed nearly a minute to figure this out / make clear, where to click to, to get money / hide the top-menu in the begining and add values, when they are available -> tried to click them in the begining, since i did not know, how they work... thoiught they are broken
Overall...
Have a look at some other idle games and copy some features. Better copy "good" than invent "bad" ;)
very strange Maths...
I've got turret dmg lvl 39 (40dmg) and Multiplier lvl 15 (x2.5).
Now this should be 100 dmg per bullet, but instead it is 99...
You should check this.
And about the people complaining about the "dmg per second" value: this is just statistic. Counting is the dmg per shoot, which is "dmg x multiplier x amount of barrels"... even when dmg per second is higher than the enemies HP, it still needs X shoots within the second to recieve the dmg.
There is also always a lot of dmg lost per second due to this mechanic, if you are not comparing the values...
I think this is an intelligent mechanism. Even though the displayed values are a bit iritating.
I really like that red text suggestion :) I will look into that