Nice game! the shooting feels really good. I like the detail when you press the F key, good work!
Some tips:
- The player needs to be more vulnerable, it is somewhat easy to just move backwards (without sprinting) and not get hit
- Add some randomness to the zombie behavior, it was kinda easy to herd the zombies
- Blood would be nice
- Give the player some reward for hitting a special part of the zombie (the most common is a headshot-instakill)
Some ideas:
- If you fill the area with fog it will feel more tense, a good thing with zombies
- Maybe the ammo is in the trunk of a car -> if you retrieve it, the car sounds the alarm and attract all the zombie
- To make the zombie to hit you, you can increase the speed over the time so eventually it will move fast enough to catch/hit the player