Do you think it would be ok if you gave 2 yellow keys instead of 1 when we have to open the 3 doors at the start?
Because getting a yellow key to open the first door once we are inside the corridors is a pain.
Especially since there are no spawner accessible yet, so getting mobs to spawn in the small bit of corridor after the 'safe room' is kinda hard even more considering the low drop rate of keys.
The extra yellow key would let us open 1 corridor which gives more ground for mobs to spawn and access to the first treasures that can yield extra keys.