Here is the full list of all 35 Project Kunai achievements.
Complete Heaven_00
Complete Heaven_01
Throw a Kunai
Throw 50 Kunai
Throw 500 Kunai
Use Dash Ability
Complete Purgatory
Fail 5 Times
Fail 50 Times
Fail 500 Times
Don't Touch Ground For 5 Seconds
Don't Touch Ground For 10 Seconds
Don't Touch Ground For 15 Seconds
Reach 24 Speed
Reach 50 Speed
Reach 100 Speed
Complete A Level Under 30 Seconds
Complete A Level Under 20 Seconds
Complete A Level Under 15 Seconds
Make B-Hop 50 Times
Make B-Hop 250 Times
Make B-Hop 1000 Times
Restart Level 50 Times
Restart Level 250 Times
Restart Level 1000 Times
Use Dash 50 Times
Use Dash 500 Times
Use Dash 1000 Times
Use Dash 5000 Times
Make B-Hop 10000 Times
Throw 5000 Kunai
Hook 5 Times
Hook 50 Times
Hook 500 Times
Hook 5000 Times