Finish the 20 first levels

Use a red line to destroy another line

Complete the level with less than the lines needed for 3 stars

Make the ball teleport to another place

Finish the 50 first levels

Use the speed to roll upwards when necessary to complete the level

Finish the stickman level

Collect 10 stars, at any level

Change the gravity of the ball

Collect 40 stars at any level

Collect 100 stars at any level