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.
Swat those flying bugs.
Complete ten levels without dieing.
Reach Level 10.
Destroy caterpillar with one bomb.
Rolly Polly isn't going to kill itself.
Destroy all blocks on a level.
Collect a laser powerup.
Kill a scorpian. Fatality.
Finish the first level
Reach Level 20.
Reach Level 30.