I need help w/ my mirror code

I am making a game where there is a level with a mirror with one where one side shows the blocks for parkour and the other doesn’t. I am having trouble mirroring the character to the other side. If anyone knows how to fix this help will be much appreciated!
Ps: Here is the link to the game the gray blocks in the middle don’t do anything other than mark the middle :))
Twin 2 (DCG) (WIP) - Flowlab Game Creator

Idk where to look :neutral_face:

You can find it on level two in the middle :))

Use this