I commented and rated yours, but it's possible a vast majority of players until now have been unable to play your game properly. I suggest you go the itch.io page and modify the resolution settings to be correct. I think you have 300px by 600px and you should have something like 400px by 800px (the actual correct size may be something else, but that bigger one may be better than the one you have now).
You are able to change this on the itch.io page without changing the game itself, all participants can change the itch.io page at any time in jams and there's no specific rule against it for this jam (and there usually isn't) as long as you don't change the game file itself, which you shouldn't need to.
You can check mine here:
Game Page: https://skykone.itch.io/cloud-survival
Rate Page: https://itch.io/jam/brackeys-12/rate/2966822