I found some similarities and differences between Yosniper's and Yuuutu's Engine.
Similarities :
kid's walking speed is 3
First jump and second jump speed is 8.5/7 respectfully
gravity is 0.4
Differences
| Yosniper's engine | Yuuutu engine |
Falling Speed Max | 8 | 9 |
vjump multiplier | 0.5 | 0.45 |
underwater gravity | 0.25 | 0.4(assumed) |
underwater jump speed | 3.5 | 8.5(water)/7(water2) |
djump possiblity when you jump outside the water | impossible | possible(water)/impossible(water2) |
max falling speed underwater | 8 | 2(water)/2(water2) |
This may not be all, but changing those help making the kid's physics like yuuutu.
Tell me if something's wrong or I missed something.
edit : title modified - Yuuutu's Engine ->Yuuutu engine