The Satchel Playground features experimental builds of Satchel and should NOT be used.
The topbar issue you are seeing is expected as the playground is currently running a build of Satchel with the chrome-topbar which is designed for the new updated experience controls (internally referred to as the chrome menu).
Due to you not having the chrome menu yet the chrome topbar, which Satchel uses, doesn’t properly align with the current legacy topbar you have.
What it’s supposed to look like:
Read more about the chrome menu/updated experience controls: