Hi, Thanks for playing!
1. The enemy was added at the last minute to add an extra factor to sort of jumpscare the player. So far, it does no damage and is only there to confuse players. However, this did not play out as I wanted it to.
2. The UI is intentionally not included to declutter the screen and make it so the player doesn't know. The upgrade text said + 2 Zombie hits, meaning you can survive 2 more zombie hits. You start off being able to take 6 total zombie hits.
3. Yeah, that makes sense. I will probably add that in the future.
4. The flashlight I think is just there to be there. If you are playing on a bright enough screen, all zombies should be visible, as zombies have a small illumination. I was originally thinking of having light upgrades, but thought otherwise as I felt that if the zombies were completely invisible, it would be unfair to the player, especially against those speedy zombies. Also, for the player area, I will look to expand that in the future.
Thanks for the feedback!