Here is the full list of all 14 Pikuniku achievements worth 1,000 gamerscore. It takes around 4-5 hours to unlock all of the achievements on Xbox One.
Kick your friend 50 times during a single level
Kick Mr. Sunshine into space
Found every insects
Get some arms
Collected 70 coins
Escaped from Toastopia
No respect for Sam's potteries
Make an artistic statement
3 baskick wins in a row
3 baskick loss in a row
Found every trophies
100% score against the dance king
Finish a coop level in less than 3 minutes
999