Title. Also in a way it's easy to understand.
Because the characters keeps on colliding on the floor.

What does smoothly mean?

Also, we can't help you if we can't see what you have so far.

PhiPhenomenon wrote:

What does smoothly mean?

Also, we can't help you if we can't see what you have so far.

Basically it hits the ground without being in the ground.

Also https://scratch.mit.edu/projects/799075295

This is a basic script:

It doesn't handle wall collisions, I can add that when you need it.

I'd strongly suggest looking at some platformer tutorials, especially if you want to also add other features like realistic gravity and smooth acceleration in addition to fixing this issue. You could probably adapt the scripts to work for micro:bit by using <tilted (right v)?> and <tilted (left v)?> instead of <key (left/right arrow v) pressed?>.

PhiPhenomenon wrote:

This is a basic script:

It doesn't handle wall collisions, I can add that when you need it.

Alright good to know.

It works! Tysm guys!

I think now is a good time to add wall collisions

You're going to need to share the project again so we can give code that works on your project.