Here is the full list of all 17 RUKIMIN's Disappointing Adventure! ~SHOBOMI AND THE PHANTOM RUINS~ achievements.
Beat BLOCK KING! ver2.0
Clear with less than 5 deaths
Completed faster than 10 minutes.
Died 100 times
Finished the tutorial.
Returned to the starting point.
Eat rice balls
Died 50 times
Beat BLOCK KING!
Died 10 times
Died once.
Game over on the game select scene.
Overflowing from the screen.
Game over on the title screen.
Meet a PRINCESS BELL!
Completed the mission.
Falling walls hold secrets.