The first thing I did was import the enemy sprite, then I added a state machine into my game. The state machine took me FOREVER, because I had no clue what I was doing at first, so I had to figure out what it was and how to add it and along the way I encountered too many bugs to count. It took me several days to complete, because the state machine got me so frustrated that I just kept stopping and coming back later. Eventually I did get it though, but it was genuinely painful trying to get the system to work, especially since I couldn’t work on anything else until I got it fixed.