Here is the full list of all 38 Toki Tori achievements. It takes around 10-12 hours to unlock all of the achievements on Windows.
Finish all hard levels
Complete all Creepy Castle hard levels
Complete all Bubble Barrage hard levels
Complete all Slimy Sewer hard levels
Complete all Forest Falls hard levels
Complete all normal levels without using the Wildcard
Collect 1000 eggs
Use 32 bridges to finish a level
Use 42 InstantRocks™ to finish a level
Find her.
Stand in the beam in Test Lab bonus level 2
Stand in the beam in Test Lab bonus level 6
Suck up 30 slugs
Find the Tunnel of Love
Complete all Bubble Barrage normal levels
Watch the ending
Complete all Test Lab normal levels
Trap Toki Tori between two Switchbricks
Stand in all sun beams
Collect all ten snowflakes that appear in December before they melt
Telewarp directly into lava
Complete all Slimy Sewer normal levels
Freeze 50 monsters
Finish Forest Falls, Bonus 3
Finish a level without using all items
Get really close to a monster
Make Toki Tori dizzy
Stand on an ice block for 12 seconds
Collect 500 eggs
Complete all Creepy Castle normal levels
Trap 30 ghosts
Press "Try Again" 10 times on one level
Play Toki Tori for 60 minutes without being idle for more than 2 minutes
Fall into the lava
Collect 200 eggs
Make Toki Tori look sad
Complete all Forest Falls normal levels
Collect 100 eggs