Additionally, select Instant Action mode, choose your levels, but do not launch. You can start the game selecting the hero, and when you die you can pick them again immediately. Select 'Hero', then change the options to Best Player, Time Limit 1 second, and the time for hero to become available to 'Always'.
Select Instant Action mode, choose your levels, then go to the options menu before you start. Note: This is the 2005 game by Pandemic Studios, not to be confused with the 2017 game Star Wars: Battlefront 2 by EA DICE.