Oh my god oh my god oh my god this is sooooo cute! Love the art style, love the music, love the mouse, love the gameplay, love the level of polish, and you even find time to do the intro comic too! Oh that was so cool! Gameplay-wise wise this brings me back to the good old mobile game days where the tower block stacking game is all around the place, and I loved that game so much. Thank you for bringing me back. The game is reasonably hard, which I am struggling with getting through 510 scores (or I am just bad at playing), but this in my opinion, is a good thing, as it lies on the perfect time frame where people won't mind trying again, and will come back for more. Super well done!
For some minor suggestions, I think there should be more types of biscuits, as currently this gets repetitively quite quickly, and also screw up the randomisation. I've got the cream biscuit 5-6 times in a row just because of that. Or else, something like the next biscuits preview would also help ease the struggle a bit. You could also get in pseudo-random instead of true random (think mp3 player shuffle) just to prevent absurd RNG patterns.
Anyway, this is a very well made game! Well done!