Your solution actually removes the top bar and other features like Chat, Backpack and Playerlist.
OP’s message asks for either only removing the top bar or making it transparent.
Sorry for bumping this thread, but if people may Google (which I did and this thread came up) for how to remove the top bar but intend to only change the transparency instead of disabling Chat, Backpack, and Playerlist which this solution will do.
You can set the transparency of the top bar with a localscript.
game:GetService(‘Players’).LocalPlayer:WaitForChild(‘PlayerGui’):SetTopbarTransparency(1)
This will retain the ability to still have the username on the top right, playerlist, and backpack tools. This simply makes the bar transparent.
FYI, you can only set this transparency to be either 1, .5, or 0.