This could come across as harsh, but it's not meant that way - overall a decent game with a good mix of minigames. This feedback is aimed at improving the flaws, and comes from someone who does some proofreading (just so you see where I'm coming from). All of these are from 0.6.0.2, on windows.
There's a few narrative issues - the most glaring one being that Louise is referred to as Louisa for a while before switching back. Louise and Elizabeth appear out of nowhere, and everyone acts as is Liz is hired as a librarian with no conversation about it? Also some ordering issues around the portal unlocks - was confused by reference to a paladin and their oath when unlocking one of the portals (possibly goblin? not sure offhand), but having had no interaction with any paladins, which was cleared up by later encountering a paladin - I presume this has been moved at some point. Also one point where Liz is in the rebuilt library, you're asking her about something, and Tom waltzes over to answer the query. Probably hard to handle that without a hard block on that Q to force it to be before you get the blueprints for the library? Also you've got the chronomage hanging around in the inn with absolutely no content, which feels... odd, honestly.
I think there's also an issue with the cards in that you can get the orange backed top tier of cards in your collection. From looking at the message when you have no new cards found, I don't think epic cards should be collectable? This isn't huge on the balancing front, other than the 3 mana 10 damage and stun spell, which is completely broken if you can cast one every turn. If you want to keep the top tier of cards collectible, which is reasonable for most of them, I'd suggest either toning down that one spell or making bosses who summon adds start with them (rather than summon on turn 1) to reduce such cheese. The thermoshock effect from that card is also only causing 50% extra damage rather than 100%, though that's minor. The spell that causes burn also deals a chunk of damage straight-off (without saying it will) - this feels ridiculous when the burn kicks in that turn as well. By far the best one mana damage spell.
My last comment would be that it's probaby best to make portal trips take time - currently they don't progress time at all.