This is a simulation, just press start. You can change settings by clicking on the gear. (TURBO MODE IS INSANE)
Newest : https://scratch.mit.edu/projects/1115172697/ Sequel : https://scratch.mit.edu/projects/442960355/ Community : https://scratch.mit.edu/studios/27923313/ Original : https://scratch.mit.edu/projects/420825183/ This is an improved version of TS.