Very nice combination of minesweeper with dungeon crawler, definitely working as intended, love the abilities with cooldowns, items and powerups, plenty of potential to expand an idea like this, also the evil laughter from the poral when clicked.
Got to level 3 before it started to feel too hard, only real critique I have would be that all enemies besides the basic rats are goblins (although pretty nice that stronger ones get different sprites), where's the bats/undead/demons/golems/evil wizards one would expect at a dungeon too?