BUGS!!!!!
1) Prison is bugged, then I reset my game and kill one enemy in less than 1 milisecond, Prison is taking few minutes, not 30 seconds!
2) Trial is bugged!!!!!!!!! Lost so much time!!!!!!!!!!!!!!!!!!!!!!!!!
Kill level 300 boss WHEN!!!!! your game chips are NOT HIGHER than 50. My game chips was at 50 level max, when I beat him! Though I level them earlier and evolved, but they were at max level 50 WHEN I beat this guy.
The last proposition, but not least is "the house of cards" (or simply casino), where you could exchange special droppable items for a possibility to gamble (e.g. choose one card of 3, where all of them would give special rewards - gold, exp, items, companions for some time).
A good idea would be a possibility to build (buy) new base extension - the tavern - where heroes would drink and for every minute spent there they would get e.g. +1% to max hp or attack value for 30 minutes. Or something like that.
Albo a room called something like "magic circle" or "dark cult circle", which would cost about 10k-40k gold, but every 1h-4h would give a random item when clicked. An uprgade for next 10k-40k gold would be nice for automation of this when idle.
Next room could be "knight's guild" or "refugee camp/place", where occassionaly some npcs would come and give you special missions (like arena or raids). A good idea would be additional companion/companions for some of those missions or even they could stay with player for 1 day to help farming or raiding.