Mastering Mario's movements is key to success. The Game Boy's simple button layout makes it easy to pick up and play, but precision is often required. Here's a breakdown of the essential controls:

- Directional Pad (D-Pad): Move Mario left and right. Pressing down will make Mario crouch, which is useful for dodging projectiles or entering small pipes.
- A Button: Jump. Holding the A button will make Mario jump higher. This is your primary method of traversing gaps, reaching high platforms, and stomping on enemies.
- B Button: Run/Fire. When moving, holding B will make Mario run faster. If you have a power-up like the Superball Flower, pressing B will fire a projectile.
- Start Button: Pause the game. Pressing Start will bring up the pause menu, allowing you to take a break or exit a level.
- Select Button: Not used in gameplay, but can be used to reset the game in conjunction with Start, A, and B.
Practice these controls in the early levels to get a feel for Mario's momentum and jumping physics. Precision jumping is crucial for many of the game's challenges.