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