Complete your first level.

Complete half of the levels.

Complete every level.

Collect 10 stars.

Collect 50 stars.

Complete a later level without dying.

Complete a level in under 10 seconds.

Die for the first time.

Die 50 times.

Get squished.

Expand 500 times.

Complete Sisyphus.

Complete Ice to Meet You.

Play for one hour in total.

Defeat the Twin.