Here is the full list of all 14 Smilemo achievements.
Clear Stage 1.
Clear Stage 2.
Clear Stage 3.
Clear Stage 4.
Clear Stage 5.
Clear Stage 6.
Clear Stage 7.
Achieve an S rank.
Achieve an A rank.
Achieve a B rank.
Achieve a C rank.
Clear Stage 3 inside of 1:30.
Get hit a total of 200 times.
Get hit a total of 400 times.