Seems like a very polished and challenging game. Sadly, I'm not able to get past the high mountain of spikes early on so I can't judge it fully.
Design is well done for the most part, I can see it being fun, the game seems original. Graphics are great, audio is good as well.
But it doesn't seem to fit the theme that well. I have critiqued other games for the same problem, that they have powerups, and picking up powerups (multiple ones) makes them "stronger together". It's just a powerup, you're not really working together, or helping each other out, you're just consuming milk, which makes you stronger, but destroys the milk.