The in-game instructions are rather dubiously-translated.
Each mission is against a different opponent.
Shift the blocks around and line them up!
Destroy that card item on the green block to clear the card blocking the screen!
When defeated, foes will release a handful of coins.
Different enemies have different attack items.
You'd think one fireball would be enough to destroy a tree...
Coins can be used to purchase costume items, which increase Marie's stats when equipped!
The snowman can make the board slippery, causing blocks to overshoot their target.
The lock item in the center makes the block completely immobile.
Grab the heart for a health boost!
Failed... but unlike real exams, you can try again right away!