I read the comments and knew that this is the dev's first game with enemy AI. Given that I am a baby player who complain about everything all the time, feel free to take these suggestions or leave it be.
- I remember that the enemy showed up as soon as I picked up the first item; if there is a system that the player needs to learn, I suggest it is better for them to complete the first task (putting in the first fragement) before chasing them down.
Note: the instant enemy chase worked in another entry because the control = the tasks that the player had to perform was more simple and instinctive.
- The enemy ended up camping at the car and I couldn't approach it. It had gone to the point where I could pick up things at the outer part of the map, but when I came back to the center, it started chasing me and won't let me go to the vihicle.
- Adding a sound or some indicator to the enemy will allow the player to track it down easier. I am not sure if the dev put a sound on the enemy because I didn't hear anything coming from it when I played.