Hold down "s" to shoot and move your mouse to spin and target enemies. This is a loop game, meaning it never ends. Yet. [UPDATING SOON] But it'll restart if one of the zombies kills/bites/touches/(whatever) you P.S: If a score variable shows up on your screen and doesn't change from 0 even as you shoot the enemies, your device isn't lagging, I'm just too lazy to get rid of it until I finish updating :)
This is here if anyone wants to see inside. Basically for beginners on scratch. If you want some other tutorials, check out: https://www.youtube.com/watch?v=V_6i1-diUY0 (Not my video. Credits to the owner) Have fun <3