Stage 1-2 is overworld-themed and the second stage in the game.
Hidden Skull Edit
The skull is located behind a secret tunnel in the second water pit. Just go down underwater and then to the right trough the tunnel and there's the skull.
The costume in this is hidden in the cave rightmost on the stage. If you go up, there's is a gap between the two platforms. Just fall down and collect the costume. Be careful not to fall on the Spikes underneath the costume.
Mobs and Traps Edit
- This stage can be completed without collecting any coins