What are the secret achievements in Bloons td5 on android

All achievements are Secret Achievements in The Secret of Monkey Island: Special Edition, so here is the list of all Achievements and their descriptions. (source)

• The Three Trials
  Completed Part One: The Three Trials. Guybrush proved himself worthy to be a pirate.

• The Journey
  Complete Part Two: The Journey. Guybrush used a voodoo spell to travel to Monkey Island™

• Under Monkey Island
  Completed Part Three: Under Monkey Island. Guybrush traveled into the Monkey Head and got the root.

• Guybrush Kicks Butt
  Completed Last Part: Guybrush Kicks Butt. Guybrush stopped LeChuck from marrying Elaine Marley.

• Sharp Tongue
  Guybrush learned all of the insults, and is the wittiest/deadliest pirate what ever swung a sword.

• Ten Minutes Later...
  Guybrush can hold his breath for 10 minutes, but not any longer than that.

• Escape Artist
  Escaped from the monkey island cannibals hut 5 times.

• RecordKeeper
  Collected all of the notes and memos sent between Herman Toothrot, LeChuck and the Cannibals.

• Human Cannonball
  Finished the entire game in record time. We hope you were wearing a helmet!

• Old School
  Experienced the original, classic adventure game, as it was in the early 90s.

• Determined
  Completed the game without using any hints.

• Marooned Everyone
  Re-marooned Herman Toothrot and marooned Carla, Otis and Meathook on Monkey Island™.

I don't have all of them yet, so I'm going to have to come back and edit this answer to include other ones, but here are the ones I have so far:

• Sunday Drive (5): Drive 50 miles.
• Road Trip (10): Drive 250 miles.
• Out of Gas (5): Take a full tank of gas to empty, in one go.
• Refueled (5): Let you gas meter fill up, to full, from empty.
• Super Sized (20): Achieve a combo level of 15 on any gold challenge.
• Bad Driver (5): Crash 100 times throughout your Valet Hero career. (Challenges only.)

Six down, seven to go.

These are pretty self-explanatory, although I think Super Sized is glitched. I got it (as well as the normal achievements Value Meal and Drive Thru) on silver challenges.