I have had same problem and full screen doesnt really work, the controls maybe felt a bit weird when I tried to turn and hit a wall but the colourful visuals were cool and the sounds were good too.
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Thanks for playing!
There's also a fullscreen button in the bottom-right corner of the browser player in case you missed it—it makes the game much easier to see.
If you meant the default presentation, though, I completely understand. I'll definitely think more about readability and presentation in future projects.
Thanks again for giving it a try!