In the newest version I started the game with the knight, I was cleaning level 3 from the rats and in one moment the game stopped working (sound worked but graphics got stuck mid rat death animation).
In the version 0,83 I was able to skip Archeos fight by opening the door with a key - but game crashed on level 13 after I tried to use the bow (Main hero Archer, with Knight and Adventurer).
I think that the knight should have an abillity to quickly kill all monsters with 0,5 health - it's quite irritating to spam the rats and bats.
Otherwise, I love this game and I'm waiting for more updates :).