How do i make an custom physics (or movement) like this?

[lselfaver696969 (mr lselfaver)]

1. What do you want to achieve? Keep it simple and clear!
   straight to the point,i need to “remake” or basically remake minecraft’s type of physics/movement
2. What is the issue? Include screenshots / videos if possible!
   Watch content deleted | Streamable
3. What solutions have you tried so far? Did you look for solutions on the Developer Hub?
   heres an video, but the 1.2.6 is another game (now 1.0 that comes with whacky code, so i cant really import that)

i do not want you guys to code me, but give tips on how to do an “mechanism” of that game
so that i can put into this game

[lselfaver696969 (mr lselfaver)]

as one of my friend told
the other game ill call it “1.0”
uses an part that never orientates as how minecraft uses
but idk if that actually matters in this post
but the issue is that the character “bounces” at the 1.2.6 version (i am trying to remake the system from the 1.0)

[lselfaver696969 (mr lselfaver)]

by the way,this will never be fixed unless anyone could give an tip on how to code it or how to do it