It would be cool if we could upgrade the abilities to reduce the countdown for the 'collect all gold' button, or even make it automatic. Maybe some other abilities, like upgrading attach speed/power, or doubling total army size for a limited time, or doubling income, etc. Great game though, and there is certainly a lot of potential left to make it even better. Keep up the good work!
it may be helpful to keep the diamond purchase level at 1 bil. coins, but increase the the amount of coins at which that event takes place to 2 bil. so that any remaining upgrades can be purchased without difficulty. as it is now, diamonds are exchanged at 1 bil. coins, and that resets coins to 0, making it difficult at times to purchase upgrades.
You may be able to do more with the managers, like promotions our training programs or whatever other type of upgrade to further enhance their abilities.
I had... I had almost reached the end... I was going to have free time again, but now, now I'm going to have to play for weeks to get the rest of these upgrades... What have you done?!?