Here is the full list of all 22 Space Warp achievements.
Complete 8th world.
Complete 7th world.
Complete 6th world.
Complete 5th world.
Complete 4th world.
Complete 3rd world.
Complete 2nd world.
Complete 1st world.
Beat personal best record 10 times.
Fall into a black hole.
Failed 50 times.
Beat personal best record 5 times.
Watch complete replay.
Complete level after almost dying in radiation zone.
Failed 10 times.
Beat personal best record.
Complete 1st level.
Failed 500 times.
Failed 250 times.
Failed 100 times.
Beat personal best record 50 times.
Compete with at least 5 friends.