It's a riddle to push the buttons in the correct order.
SPOILER BELOW
I believe it's Top-left, Bottom-right, Top-right, and bottom-left
**Spoilers for final Boss Strat**
It's recommended to be at level 7 or 8 at least. Reserve Aireen strictly for keeping up HP and MP and the protections spells to mitigate the damage. Shimmer can also heal with her AoE milk healing skill if everyone's looking bad. Rose and Frez specifically are the damage dealers unless thing's are looking bad, heal themselves.
at 50% HP, she'll start to use use a skill that'll make her invulnerable unless you burn her with Shimmer's fire spell. Continue as normal once the spell is removed. Be careful not to let your party members die. Keep them alive, otherwise it'll be difficult to catch your momentum again.
Hello all! I am pleased to announce the launch of my Discord Server! If you wish to keep up and ask questions about the game, maybe even pitch some ideas, this is the place to go: https://discord.gg/FPH8URnJ82
So there are a couple factors to milk.
1) It goes up every second based off of MPR (Milk Production Rate). You start with 2 and the max you can get is 4 in the demo, so that's 4 milk every second walking around. In battle, it's 10 milk per MPR per turn, so at 4 MPR, it's 40 per turn.
2) Max milk is based off level. Level 1 is 500 and goes up by 50 each level. So you got 900, that means you made it to level 9 :P