Super Onion Boy 2 (EP)

Here's my Achievement Walkthrough with commentary running you through the first 8 levels and collecting 40 stars.
Timecodes:
Intro 0:00
Level 1 1:07
Level 2 2:51
Level 3 4:27
Level 4 6:03
Invincibility 6:35
Level 5 7:05
Level 6 8:50
Blue Jellyfish Boss 10:25
Level 7 11:04
Level 8 12:25
Forty Stars 13:30