Tried it run on Firefox but get this error: https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS/Errors/CORSDidNotSucceed?..., also tried it on Chrome and it didn't work either.
Also on Edge it doesn't work.
Edit:
Tried it second time on Chrome and it magicaly worked. Game looks awesome and love recoil of the gun. I would maybe give enemies less health or make some effect when hitting them. First I didn't even knew if I hit them or not, because it took too long to kill them and no visualization of hits was shown.
Simple but nice game.