The art style is nice and the idea is interesting - unfortunately the controls are really unintuitive and it's hard to tell what/if you're getting close to a win-state. I wasn't sure what the circles on the ground were supposed to be, and for a while I thought the hospital was like a tomb or mausoleum. I didn't realize I had to click and drag on the zombies to target them somewhere, so for a while I was just aimlessly spawning them and waiting for them to get killed. I like that you included the tutorial screen, because it's really needed - but it doesn't explain a lot about the game, and actually contradicts some of the gameplay mechanics; i.e. the only thing it tells you is "click on tomestones to spawn zombies" - but then the zombies cannot be click/dragged or targeted and they wander off on their own, as opposed to staying in one spot like they do in the live game. I also couldn't figure out how to get out of the tutorial and back to the game itself, so I ended up reloading the game each time. This game has potential - I just feel like it could use a lot more polish, especially since you submitted it 20 hours before the deadline.  EDIT: just saw your comment about technical difficulties. That's unfortunate! I hope you are able to come back and work on this some more. 

It's really good!, i liked the artstyle of the game and the mechanic to attack survivors as a zombie