Unfortunately I wasn't able to get this running, no matter what I tried. Engine export pipelines (Unity or otherwise) can be genuinely finicky, so this isn't a reflection on the game itself, just the build.
From the thumbnail, the little fox looks really cute, and it looks like it's shaping up to be a nice-looking platformer.
Since I couldn't actually play it, it wouldn't be fair for me to rate it. If you get a chance to post a working build, I'd love to come back and give it a proper try! Bonus if it's browser playable.
The error I got was:
The code execution cannot proceed because UnityPlayer.dll was not found. Reinstalling the program may fix this problem.
The build folder is missing some files. I don't normally work with Unity, but I think Game Engines typically export an .exe alongside a folder and a few .dll files which should be zipped together and uploaded.