A few thoughts:
1. The school is kind of empty. Day, there are few students. It made sense to see the infected attacking them.
2. Only flies have a double attack. Why don't others have something like this? Except for the headmistress's office, since they move around in companies. A good example is when we lift the gate.
3. It would be interesting to see the animation of the attack in the toilet. For example: we go into the booth, we are attacked right in the booth.
4. Rescue of the uninfected. The ability to pull them out from under the attack of zombies. If we immediately start rescuing while the enemy is nearby. Then they attack us and grab the NPCs.
5. You have an animation - crawl on the floor. Why not create a zone where you have to crawl quietly without attracting attention?
6. Damage to clothing. (corny, but logical).
7. First aid kits. The amount is normal, but the problem is that they can be picked up when the health is full.