Virtual Boy Wario Land (Japan, USA) ROM

Wario wakes up to notice some masked monsters lurking nearby. After following them into a cave he finds a huge treasure. When he tries to steal it he springs a trap and plunges to the bottom of a labyrinth. Now he has to climb all the way to the top again (while collecting as much treasure as he can along the way, of course).
This game makes use of the stereoscopic 3D effect by giving Wario the ability to, at certain points in the game, jump between the forground and background. Apart from that ability the game plays quite similarly to Super Mario Land 3: Warioland for the Game Boy, even having some similar power-ups.