If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
Dungelot is a fun casual rogue like that plays almost like a strategic Advent Calendar. Flip over tiles to reveal amazing treasures or deadly monsters in your search for the key to exit the level. While your eventual demise is all but guaranteed, you can use your loot from previous runs to build up your characters and ensure each run can be at least a little deeper. Have Fun!