UI issues for new users

The UI looks like a web based game.

The Play button at the bottom is far far below.

The play button also does not seem to autopause when i change from buisness to moths to forest fire.

Is it intentional. because there seems to be no autopause but changing from one to another auto resets the simulation to start state.

No file, test, or entry point is named in the issue. Start by running the simulation and checking the UI around the Play button and switching between Business, Moths, and Forest Fire. Clarify whether switching should pause, reset, or preserve state, then verify the chosen behavior and button placement manually.

Written by the indexing model from the issue text.