A nice take on the topic! I really liked the idea, and it has a retro shooter vibe to it, a bit. Yet after a minute of playing, I was hoping to get something happening - and when a bus arrived, I was excited, but nothing really happened. So basically I felt a need for some kind of progression, or a loop, or increased difficulty. But that's of course something that could be added later if you want to continue with this game! With a progression, it could be really cool! Or even more so - I can imagine it as a scene of some broader shooting game, where levels differ - you shot vampires at one, a werewolf or someone else in another, with a slightly different twist for each scene :)