New version is ready to try out for debugging! In the last room, i tried out if I can put twice the same player(1) next to eachother to double the sprite windth and yes, it worked.
Unfortunately, with a constantly moving object like you, I just don't have enough space for the code left.
-Left Difficulty Swicth: Starting with 3 or 1 lives.
-Right Difficulty Switch: Turn music on or off
-Select: Turn flashing on or off. Turned off black rooms will be dark gray
The adult xenomorph gains one life as it kills someone.
To finish the game, you have to kill all the people and destroy the generators.
You can find the latest binary at the link in the first post.