Here is the full list of all 30 Ethan: Meteor Hunter achievements.
Complete the three challenges in all levels
Complete the time challenge in all levels
Use THE most secret code in the world
Complete the pause challenge in all levels
Complete the fragment challenge in all levels
Find every french cheese
Finish all the levels in the greenhouse
Finish the three levels with the vessel
If you stack it up, will it still bounce?
Finish the three pogo levels
Be propelled by a mousetrap 50x
Be propelled by air 50x
Finish all the levels in the cave
Destroy all the items in any level with the vessel
Spend a total of 60 minutes in pause mode
Did you want to do that?
Do you think you're an acrobat?
Finish all the levels in the sawmill
88 miles per hour!
Get to the exit really very fast
Use it, that's what it's there for!
Use 200 pause items
Burn 100 blocks of wood
Jump 2000x!
Remain stuck on a puzzle for too long
Get killed 20x by a mousetrap
Collect a total of 1,000 fragments
Die 10x in the same level
Finish a level without using a pause
Complete a level without using any checkpoint returns and without dying