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