Thanks for the suggestion about the environment! I agree, that would definitely add to the aesthetic of the game. Watching some other people play this, they too struggled with the Red Keycard, so you're not alone! I think it's because the puzzle is teaching the player two things at once, rather than going one step at a time. That's the sort of thing that could be alleviated by adding more levels, which we might do after the jam is over. Thanks for the kind words!