Love the game, had no problems with upgrading troops (it was just the right pacing, had a lot of extra gold at the end, but up until the Dragon was struggling to 'MAX' all- Maxing is possible, only with dedication, exactly as it should be :)
1thing-
I have no clue how to get Gold Medal on two levels. Needs some kind of menu screen where it shows your awards/achievements/statistics whatever just give me something to count and tell me how to get it :)
I will definitely play the sequel.
EDIT: checked the Gold Medal requirements...ehh I did that and it's not counting it right :P Oh well, nice game play anyway :) Just need to add the features asked for, and some kind of Trophy system, and something stupidly Super Powerful like a Balrog that you get after 100%ing the campaign, so that you can have 5 minutes of cheap lols as a reward for all the grinding :D
 "Epic War Saga"){kind=icon}
 "Demons vs Fairyland"){kind=icon}
 "Hordes and Lords"){kind=icon}