Controls:

A - Z on keyboard, B on Xbox Controller, O on DS4 - Swing Sword
B - X on keyboard, A on Xbox Controller, X on DS4 - Throw Fireball
Start - Enter on keyboard, Start Button Elsewhere - Pause, which allows you to change music and effects levels
DPAD - Directional Keys on keyboard, DPAD elsewhere

Jump with UP on the DPAD.

A game I found in a bargain bin for the GameJoy.
Find at least 4 hidden keys to be told a secret that was never meant to be a secret.

Key Location Hints:
1-1: Just a little bit above.
1-2: Don't go just yet! Wait a minute or two.
2-1: Just a little longer, outside of where you should be.
2-2: There is more than the exit to find in a maze.
3-1: From below, to above.
3-2: ???