Launching game is glitched (UE4 1.12.5)

I have been trying to make a 2d platformer template for a collage project and I have made the world using tile sets but for some reason my tile set map will not show when I launch the game but it does show when I just preview the game.


Launched Game:

it would be a massive help if someone could let me know since I don’t think the launch game should be this drastically different to the preview.

just to say the launch option worked perfectly before and I did nothing to the camera to make it change to look like this.

Never mind I fixed it by closing ue4 down and opening it again. probably should have done that in the first place.