Here is the full list of all 23 Candle achievements. It takes around 6-8 hours to unlock all of the achievements on Windows.
Ignite all the fire spots throughout the adventure
Drop from a high spot and stay alive
Think carefully how to protect yourself from that rock
Spread the blue fire as much as possible
Remember to turn off your candle while you are hidden
Complete Act 3
Try to confront the monster on your own
Win the game and do not lose more than 1 token
A mother always protects her children
Fire is not always your ally
This rings a bell...
Complete Act 2
Monkeys don't want to be disturbed
Survive underwater for over a minute
Your candle is not THAT powerful
Jumping is not always possible
Complete Act 1
Escape from a chasing Wakcha
Jump over a Wakcha
Fall into the same trap twice
I'm sure this is not what you wanted to do here...
Use the light burst power of your candle to unveil a hidden painting
Your journey is just beginning...