When you complete the following tasks in the game new contents will become unlocked.

Correct Change:
Get 1 Stamp.

World Blend:
Get 2 Stamps

Memory Adition:
Get 3 Stamps.

Tips Option:
Get 5 Stamps.

Days and Time:
Get 6 Stamps.

Stamp Designer:
Get 8 Stamps.

Finish Position:
Get 10 Stamps.

Hard Mode - Word Blend:
Get 12 Stamps.

Select Song Masterpiece Recital:
Get 14 Stamps.

Determine the Time:
Get 16 Stamps.

Missing Symbols - Hard Difficulty:
Get 20 Stamps.

Calculate the Height:
Get 22 stamps.

Memory Addition - Hard Difficulty:
Get 24 stamps.

Block Count - Hard Mode:
Get 26 Stamps.

Hard Mode for Sign Finder:
Get a time of under 17 seconds.

Memory Addition - Hard Difficulty:
Get a time under 40 seconds.

Hard Mode - Word Blend:
Score 100 points.

Masterpiece Recital - Hard Difficulty:
Get a perfect 100 score.

Calculate the Height - Hard Difficulty:
Get a perfect 5/5 score.