yes they are ,as the polar bear is already in the patreon version of the game ,(bassically more upgraded version of the game,tho you have to pay 5 $ for it).and yes there is an eta for act 3,as there are updates on the game almost every day :P
Also if you want to see more information about the game or anything else, check this page out :https://www.patreon.com/CarrotsCritters (it should help you a bit,probably).