A long time ago I made the mistake of making a game in Side-Scroller Mode. I like to keep my page nice and tidy so I don’t like random unused places. I want to make that place into another game but I think Roblox’s core scripts are changed because I don’t spawn in. I know I could just spawn by script but that is probably not the only thing changed.
Are you trying to completely wipe the game out and make a new one there? Because if that’s the case you can go File > New, which will open a blank .rblx place file with only a baseplate in it. Then you can go File > Publish to Roblox As… and select the desired place you want to wipe out.