How to Sync Movement with my own physics ?

Hi.

I'm working on a 2D game (TowerFall Ascension-Like)
I don't use the Rigidbody2D but i created my own physics (With this tutorial : https://github.com/SebLague/2DPlatformer-Tutorial

When i test my game the movement is not smooth.

Here my inspector :
puu.sh/tsJvo/133862d284.png

Thanks !