How do I path following

Hello I want to create a game very similar to rgb express (link to what game looks like) :https://www.youtube.com/watch?v=5XIMv5bVtZI

So basically I want to figure out a way for the user to touch and draw a path and have the player follow it.

Thanks in advance

You can use this tutorial and tweak it to your wishes.

https://www.scirra.com/tutorials/762/follow-a-path

Follow the topic below: