Here is the full list of all 42 COME INSIDE MY INNER WORLD achievements.
Get a billion hearts
Beat the game and delete the save in settings
Enjoy all visual in gallery
Click the girl one thousand times
Visit the gallery
Buy up all the bonuses
...
Meet the streamer girl
Meet the outdoor girl
Meet the loving pair
Buy 42 bonuses
Buy the bonus of every type
Get five million hearts
Get ten million hearts
Meet the maid
Get a million hearts
Meet the fitness girl
100,000 hearts received through waiting
Get half a million hearts
Meet the top-down girl
Get one hundred thousand hearts
Get fifty thousand hearts
10,000 hearts received through waiting
Spend 31337 hearts
Meet the spiritual girl
Get 10,000 hearts
1,000 hearts received through waiting
Get five thousand hearts
Meet the relaxed girl
Fully upgrade one bonus
Spend 1337 hearts
Get one thousand hearts
Spend 420 hearts
Meet the ghost!
Reach the final in free mode
Get five hundred hearts
Spend 69 hearts
Make your first bonus purchase
Get one hundred hearts
Win the first heart
Enter the ingame statistic page
Start the game