Also, doomsday zone user a different pallete for the background than the final version.
Here's the proto:
And here's the final version:
Seems like flying battery wasn't fully complete. Here's the same place on the proto and on the final version of the game.
So... I'm not quite sure this is worth spending my first post ever around here, but I just had to mention the first thing I discovered while...
Separate names with a comma.