If someone has problems with hard badge here is some info of how much I was able to get on each lvls:
lvl2 80%. lvl5 92%, lvl 14 31%, lvl15 58%, lvl16 82%, lvl17 33%,
lvl18 67%, lvl19 71%, lvl20 52%, rest 100% = 1666%
Two tips for those who are terrified by the amount of grinding required by this game.
1. Don't buy 2nd duck, 1 is enough
2. It seems that some trainings give more lvls than others. Grasslands 2nd, Swamp 1st, Mountains 1st+3rd, Glacier 2nd and City 2nd+3rd. I felt that i saved a lot of time skipping the other trainings and focusing on the mentioned ones
The ending was a bit dissapointing. From the moment you can build shrine (and building it at every building spot) you can 1-shot every enemy with the last skill in a skill-tree - I was expecting a little more challenge :(
Damage notification is too slow. In longer fights (like the boss fight) its unable to keep up and after you change character you still see notifications from the last fight. Problem would dissapear if few boxes could appear at the same time or maybe just make them float faster
When upgrade window is open, would be cool be able to change units. Its annoying when you have 10 units to upgrade and you have to close upgrade window, click next unit, open upgrade window, upgrade and so on...