the dungeons are way stronger than the heros can possibly be at the same lvl.
maybe add only 1 monster and trap per lvl. or maybe maximum 3 monsters per room.
Thanks for all the feedback, it really means a lot, I will try to implement fixes for disconnected dungeons asap, I will also try to balance monsters/dungeons vs heroes, it can be quite rough, I also implemented a rudimentary stat screen for heroes