For Demo v1 (eotu_demo_v1.nes)
Here are some Game Genie codes:
ESOGPLEY Invincible
AASKXZIA Multi-jump
ATSAIVSA Walk through green sliding doors
Here is a map: etou-map.zip
The map is draft quality. It's made of screenshots that include the player character and health meter, and sometimes the screenshot was taken before the colors faded in all the way, so some of the screens have dimmer colors.
The zip file includes the lua script I wrote for FCEUX that helped me take the screenshots automatically.