From now on you can experience different campaign every run! 

General ideas for levels are preserved (for example on level 2 special rooms appear, on level 4 players get shotgun etc)

For people which don't like the rush of Arcade, but like procedural games.

Players that liked that how the campaign before can toggle "Legacy Campaign Generation" setting in Misc options menu.

Also added link to feedback form from main menu. Let me know what you think!

-PKCat