Identify Side scroller about a mining girl

[Eremin]

You play as a girl with a pickaxe and each level, you have to navigate a small maze to find a key and open a door,

 

[KPatch]

Hailey's Treasure Adventure?
Though it's finding gems and then returning to the start

 

[Eremin]

Hailey's Treasure Adventure?
Though it's finding gems and then returning to the start

You're right, and this is the game!