Progressive velocity endless runner (holes between sprites)

Hi, i’m trying to make an endless runner. I’m having some torubles making the game progressively faster because if i increase the “land” movement speed after a few seconds are created little holes between the sprites.

Has anyone some advice to fix this?

Here is the link of the prototype:

This is an old thread in which the poster has the same problem. Does the solution at the end help you?

I’ve already seen this thread but i think my problem is different. I have this problem only when i try to increase the velocity while playing

Instead of setting the x position of floor1 to floor1.width(), try setting the x position of floor1 by adding floor1.width().