Here is the full list of all 12 Lotion samurai achievements.
Complete Stage 1 within 31 seconds
Completed Stage 1
Completed Stage 2
Completed Stage 3
Completed Stage 4
Completed Stage 5
Completed Stage 6
Complete Stage 2 within 30 seconds
Complete Stage 3 within 26 seconds
Complete Stage 4 within 33 seconds
Complete Stage 5 within 33 seconds
Complete Stage 6 within 40 seconds