Here is the full list of all 31 Lifeslide achievements.
Complete the game
Reach the final realm
Travel 10,000 in one run units on Zen
Find the hidden spot in "Giving"
Reach maximum speed
Reach Maturity
Find the hidden spot in "Loving"
Use three Will power-ups in a quick succession
Reach Adulthood
Find the hidden spot in "Awakening"
Collect 10,000 in total
Reach the realm of healing and dreams
Find the hidden spot in "Fighting"
Reach the realm of growing up
Use Knowledge 30 times
Regain time after it runs out
Whilst holding a power-up, collect a different power-up
Find the hidden spot in "Understanding"
Make your first improvement
Reach the realm of imagination
Brought to life
Regain time after it runs out quickly, three times in a row
Maximum improvements
Unlock all planes
Play with all planes
Clear the entire game without dying
Pass "Fighting" with the third plane
Pass "Loving" without collecting any particles
Find the hidden spot in the "Revealing"
Find the hidden spot in "Creating"
Find the hidden spot in "Healing"