thank you so much for playing! and giving an insightful response >:3. one way to fix focus i found was to click the game a few times in browser so your mouse locks temporarily to the game
I did notice that working.... but then when the level changed it would hang up the browser. For whatever reason, when the game didn't have focus, the browser didn't hang. still, it was only a minor annoyance, and the game was still fun!