Here is the full list of all 50 Yeah Jam Fury: U, Me, Everybody! achievements.
Complete 100 B-Side Stages
Complete the 'Ghost Pepper' stage
Complete 50 B-Side Stages
Beat 100 levels
Collect 45 stickers
Complete 'Happy Birthday'
Beat 'Oh Love' in under 30 seconds
Complete 10 B-Side Stages
Step foot on ten-thousand blocks
Break fifteen-thousand blocks
Complete 'Z-Mart'
Have Ms. Carrot freeze Yeah, Jam, and Fury each at least once
Launch Ms. Carrot into Mr. Snowman's Face
Fall off 'Lose Your Footing' 5 times
Beat 'Thread the Needle' without refooting
Pass through 200 Flags
Beat 'Happy Birthday'
Make five stages in Stage Builder
Beat 10 Custom Stages
Collect 30 stickers
Quit out of five unbeaten custom stages without getting the mango
Make a stage in Stage Builder
Lose 'Z-Mart' with an accrued debt
Complete '5,000 Blocks'
Fire 20 blocks in a row without jumping or switching
Beat 50 levels
Witness Mr. Super
Beat 'Icicles' in under 11 seconds
Complete 'Oh Love'
Hear "What's going on?"
Beat 'Eurydice' without using the tops of the spires as checkpoints
Swing your hammer against 1,000 blocks
Beat 'Shaftcase' without refooting
Beat your best time on any stage twice
Collect 15 stickers
Complete 'Lights Out'
Complete 'Space Jam'
Beat 20 levels
Complete 'Just Grab It'
Create and break the same block three times
Collect one of every common mango
Transition between dudes 250 times
Fire a block at your head to force a switch to Fury
Finish a stage as Yeah
Finish a stage as Jam
Finish a stage as Fury
Grab the mango in the credits level
Play with the title screen and access the credits via this method
Restart a level
Mute the VFX