Here is the full list of all 11 Bad Caterpillar achievements. It takes around 0-1 hour to unlock all of the achievements on Windows.
Finish the first level
Kill a scorpian. Fatality.
Collect a laser powerup.
Reach Level 10.
Reach Level 20.
Reach Level 30.
Rolly Polly isn't going to kill itself.
Complete ten levels without dieing.
Destroy all blocks on a level.
Swat those flying bugs.
Destroy caterpillar with one bomb.