Adjusting a background image to a tilemap?

I have a student that used a background image instead of a tilemap and now has some issues with the funtionality of his game. Is it possible to change the background image into a tilemap to address the issues?

https://arcade.makecode.com/S53824-35218-76327-30115

Honestly I don’t really see anything wrong with it…
Could you specify the issues in question?

ohhh I’ve had a problem with this before or at least I think this is it so umm correct me if I’m wrong but is it that when there’s game over the game or screen is supposed to show up (backround image) tell me if I’m wrong so I can help with what’s going on

The student has tile overlap blocks set up in his code for the sprite to go to different bonus rooms. However, because he has a background, the sprite isn’t going over these tiles. We thought that making the background image into a tilemap could fix the issue.