OMG, thanks a lot for the detailed feedback!
I didn't add any browser active logic though, that was probably a bug LOL, but glad it showed up at a nice time!
I played your game and loved it, btw. The sticker art is superb, congrats on that :)
I did a kind of simple drawing system, so, the continuous drawing sound is just a sound that keeps looping and pauses when you stop drawing. For the comparison, it was mostly pixel comparison logic, so, checking the pixels colored against the real image (with some logics/coeficients to add forgiveness). I'll send a ping to you on Discord, in case you want to talk about it more.
And btw, awesome idea on the chill mode! I'll surely add that to my backlog! Thanks a lot and see you around :)