I recognized the Yawning Portal right away and absolutely love the concept of this game! I played for several hours and unlocked everything, but haven't found any loot higher than Epic, traps higher than Rare or monsters higher than Legendary, so I'm assuming they haven't been added yet, so I'm very much looking forward to the next update!
Feedback/Things I'd love to see:
1. Monster sizes determining how many can fit in a room. Four small (like kobolds currently) or two medium (like spiders currently ) or one large monster would provide a ton of potential combos. E.g. Three Quasits and a Dark Cultist in a room, or a Bearded Devil and two Vampire Spawn would synergize well.
2. Traps that combine/upgrade to make new/stronger traps. E.g. Combining Illusory Floor with Sewer Grate raises the DC or gives them disadvantage.
3. It would be cool if you could put the Mimic (chest) in the treasure room and the Mimic (door) in-between rooms.
4. Monsters gaining XP (killed Hero level = XP earned maybe?) would feel really good, and leveling up could be as simple as +10% base HP and damage, and they either lose a level when they die or reset to 0.
5. Being able to unlock either faster game speeds, or at least faster rope descending would be nice for late game.
6. Using Souls to cast spells on your monsters/rooms would be cool. E.g. Heal: restore 2d8 HP to a monster, or Fireball: DC 15 Dex save, deal 6d8 fire damage to everyone in the room, or half on save. To keep it balanced they could either have a cooldown or be limited to once per party per room or something.