OHHHHH, I know why the enemies aren't showing up! It's because there's two different folders for front view enemies and sideview enemies! You have to paste the stuff in the right enemy folder! Okay, problem solved!
You know, I sometimes ponder if working on the story and details is more necessary than the game itself. Its... technically work, just not direct.
Like for me specifically I never stop evolving the story based on what avenues I can approach in gameplay and then I get anxious thinking "hey good thing I thought about that now instead of later". Repeat ad nauseam.