It's a pretty good game. Just a few small comments that I think might be useful:
- Work on the colliders. Make the zombie collider bigger and the player collider smaller. In some cases, the zombies were far enough away that I thought I was safe, but they took my life. And in other cases, I was shooting very close to the zombie, but I wasn't taking their life.
- Shorten the reload time a little. I think this type of game needs to be more frantic; it would be great if there were a lot of shots. Also, if you do this, I would put some obstacles on the map so you can add some difficulty to the game (understanding that now you can shoot more often and eliminate the zombies more easily).
- Pause the game during interactions. I tried to interact with the guy at the Ban, and the zombies kept coming at me, so I didn't try to interact again because I was afraid the zombies would reappear. If you don't want to pause the game, maybe a sound from the zombies when they appear would be useful so I know I'm in danger and can stop interacting.
The controls button didn't work for me. Also, a button to mute the sound and another to mute the music are always necessary in web games, considering that you're probably listening to music or have other tabs open. One of my teachers said that web games should be muted by default and that we should be able to choose to activate the sound, but I think that's a bit extreme, haha.
These are small changes that I think could greatly improve the game as it is now. Congratulations, creating a game is not easy, I know, and you have made a very solid, very good, and entertaining prototype.