Here is the full list of all 40 Shing! achievements.
Finish the story (Alternative Ending)
Find a hidden encounter
Prepare a homemade chicken soup
Finish the story
Beat the final boss
Complete Level 7
Master Level 7
Beat the 6th boss
Complete the 6th lore room
Master Level 6
Complete Level 6
Complete the 6th challenge room
Beat the 5th boss
Master Level 5
Complete Level 5
Complete the 5th challenge room
Complete the 5th lore room
Master Level 4
Have 4 powerups on a single character
Master Level 3
Master Level 2
Achieve a 200 hit combo
Master Level 1
Beat the 4th boss
Complete Level 4
Complete the 4th challenge room
Complete the 4th lore room
Beat the 3rd boss
Complete the 3rd challenge room
Complete Level 3
Complete the 3rd lore room
Beat the 2nd boss
Complete the 2nd lore room
Complete Level 2
Complete the 2nd challenge room
Beat the 1st boss
Complete the 1st lore room
Complete Level 1
Complete the 1st challenge room
Complete the tutorial