hmm.. strange after your comment, I tested on 2 browsers
1. Chrome Version 107.0.5304.88 (Official Build) (64-bit)
2. Microsoft EdgeVersion 107.0.1418.26 (Official build) (64-bit)
and everything works fine for me. Have you tried to run the full screen? Game ratio is 16x9 and screen resoultion set up 1920x1080 maybe you use a different one?