Pretty basic but functional. It's okay for a begginer I guess.
This are the things that I think that need a look:
* The map is way too big, the player movement is not that fast to rapidly explore it and find the small items required to complete the game.
* There's no reason for the player to actually kill the enemies. In this case the player is way faster than the zombies so they never catch the player and since there are not that many zombies, the player can just evade them. By this I mean that there's not that much difficulty.
* For some reason the main character and the zombies are represented with bunny sprites. This breaks the coherence that the player was following on the intro and the images presented to give context.
* I already mentioned that there's no reason to shoot the enemies but even if the player wants to, the reload time is a bit too much. The zombies take almost 2 magazines to kill and with the big reload time it just solidifies the strategy of just not shoot and walk away.
Also, some nice addition could be to add indicators towards the items so the player at least knows in which direction can move to start gathering the items.