Ok. So I gave this game a very fair go all things considered. And I don't mean I played it a couple of hours, I played it like any idle game where you go through the resets to increment your stuff and build up over days and I have come to one undeniable conclusion.
Your math skills do indeed suck.
You applied an essentially linear upgrade and bonus system to something that needs a logarithmic system. Simply put the cost of units goes up way faster than your ability to earn does and you get nothing to make up for that from those expensive upgrades. Even the reset increment ends up falling flat, like completely.
To put this all into perspective for you if you are still not getting my jive, I have 1.332x10^8 soul orbs currently (that is 133 million or a 2.6 million fold increase in production). If we are to consider the goal of the game is to reach level 300 on all units and I currently have 100 of each of the last 4 units and 200 of each of the first 4 it would take 31 hours to get to level 300 for the peasent (the lowest level unit) but it would take 227.3 YEARS to reach level 300 for the priest (4th lowest unit). It would take 17 YEARS to earn enough just to get the necromancer to level 200!! YEARS dude! Not days, not months, bloody f*king YEARS!!! And that is with a 2.6 million fold increase in gold.
Not only that but it turns out that after about 15 minutes of play the only two units that significantly add to your income are the necromancer and the palidin (125 days to level 200). The total production for my units is 4.95x10^19, the necromancer produces 4.14x10^19, the palidin produces 0.81x10^19, everything else produces 0.00663x10^19. That is 0.1% of total income.
So there is only value in increasing the number of those last 2, and mostly just the last 1... But wait the cost is still going up incrementally.. Hmmm.. How fast does it increase?Not very fast the income only sees a 4% linear increase each round, add that and the level bonus for 200, and 300 and I would still only be making 4.96x10^20. So lets assume I could get all of the benefit without cost and use my level 300 to make my money.. It would still take 1.68 YEARS to earn the money that it would cost to put that same necromancer at level 200!!!!!
Are you seeing the problem?
Beyond that, as others have said there isn't really a goal or much to do. Everything is very, very limited. The buttons do not work well sometimes clicking results in a response in the wrong area, other times it results in a click on the WRONG SCREEN... Wait, what? Yep, the wrong screen, it will click through the upgrade screen to the main screen. You can reset your game without leaving the upgrade page...
Overall the game doesn't feel like it is finished or like it was well thought through. I gave it about a week which is i'm sure more than most. I don't want to be entirely discouraging so I am giving you half a star for encouragement. But that is all, the game needs serious re-working and re-thinking.