It took me 4 tries I think.
It is a cool boss fight, I enjoyed it. The game looks nice and consistent, the music is catchy, the big difference in scale between the two modes is great and the ridiculously sensitive movemement controls when big is a nice and funny touch. The game controls well (when tiny of course), it offers some cool bullet patterns to dodge and the size of the two life bars is appropriate, the difficulty was perfect for me for the jam.
Some sound feedback when hitting and getting hit would increase the feel and sturdiness.
Thanks for sharing!