Great art, everything feel fluid, nothing out of place, it's short but really polished.
Only thing and it's a tiny nitpick, it feels bad that rejecting a brain (when it's indeed too big) does not give a point. It makes sense if the "lore" is that the doc need 10 test subjects, but still, feels bad man!
PS to the doc : If you need a 10th subject just pick yourself, stupid! 
Viewing post in Big Brain Extension Project jam comments
hahaha you're right, that screenshot is so funny xD I hesitated a lot between the two possibilities for the score, and then I though it was more logical that way, because you admit 10 subjects, but yeah it feels bad especially if you have a lot of big brains in a row and have to "wait" to complete the game.
Thank you so much for playing and for the feedback!