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!
Found this old picture in the plastic case with my medical documents. I don't remember who this character is (I draw a lot of original characters and forgot about them very soon), but I like the design, may be I'll add guy in my game.