Collect the proper amount of points to unlock characters and color palettes. Note that the characters you unlock will go in order from A to I, skipping whichever letter you chose at the beginning of the game.

Unlockable	How to unlock
Blue-Green Color Palette	Acquire 1,650 Points.
Brown Color Palette	Acquire 1,150 Points.
Dark Gray Color Palette	Acquire 600 Points.
Eighth Letter Character	Acquire 1,900 Points.
Fifth Letter Character	Acquire 700 Points.
First Letter Character	Acquire 100 Points.
Fourth Letter Character	Acquire 520 Points.
Light Gray Color Palette	Acquire 800 Points.
Light Green Color Palette	Acquire 170 Points.
Orange Color Palette	Acquire 310 Points.
Pink Color Palette	Acquire 450 Points.
Purple Color Palette	Acquire 2,200 Points.
Second Letter Character	Acquire 240 Points.
Seventh Letter Character	Acquire 1,400 Points.
Sixth Letter Character	Acquire 950 Points.
Teal Color Palette	Acquire 50 Points.
Third Letter Character	Acquire 380 Points.