Here is the full list of all 23 Light Fantastik achievements.
You went through a portal.
You finished steam subscribed level.
You passed the first level!
Level published to seam workshop.
You passed the 10th level!
You passed the 20th level!
You passed the 30th level!
You passed the 40th level!
You passed the 50th level!
You passed the 60th level!
Time is over 100!
That portal turned you into a ball.
Very dark.
Now you will jump forever.
Oh, this portal is hard to explain.
A strange portal again.
Killed by enemy.
You jumped no more than 12 on level 12.
You jumped less than 20 times on level 56.
You finished level 55 and still have 60 seconds.
Don't die and make a strike in levels 21,22,23,24 and 25.
Don't die and make a strike in levels 40, 41 and 42.
Don't die and make a strike in levels 51, 52 and 53.