After the release I got some more very useful feedback, based on which I made some small updates.
List of changes:
- The normal difficulty mode now shows you the walls in the dungeon, making it easier to navigate;
- Cell with boss now has a special icon, after its exploration;
- When selecting a hero, you can now see his basic attack power;
- Fixed a lot of buggies (really a lot).
In future updates I will try to add more hints in the control and explanation of the mechanic of the game.