Aero the Acro-bat 2

Start on the start game screen.

End when is when you beat level 3.

Unclear mechanics
Jump+jump again to do a diagonal upwards spin attack
Jump+A while in the air to do a spin attack into the ground.
Y fires star ammo.
down+x while running does a slide.

When you run out of lives, you get 3 continues, if you run out of continues you have to start all over, but there is a level select code below

Enter the options menu, and play music tracks in the following order: 10, 15, 06, 08
Start the game, pause, and press Down + A + L + R together.