Here is the full list of all 22 Human Rocket Person achievements.
Get the gold apple medal in level 1
Use your special ability
Get the gold apple medal in level 3
Do a backflip
Get 5 gold clock medals
Get 5 gold apple medals
Poop for more than 5 seconds straight
Die 100 times
Die 200 times
Complete the game
Make it through level 6
Get all gold medals
Get both gold medals in level 1 in one go
Knock out 5 hedgehogs without dying
Do a frontflip
Do a 720 degree backflip
Stay alive and move for more than 5 min.
Poop for more than 10 seconds straight
Poop for more than 15 seconds straight
Get 10 gold clock medals
Get 10 gold apple medals
Stay alive and move for more than 10 min.