I'm not sure this run is legit but l figured l'd submit anyway? So l got the Boss 4 Skip and with it softlocked the final boss, as usual. Thing is, quitting out of the final boss with F2 seems to count as the game being completed? It unlocks endurance mode, which you can see was locked before the run started.

Also, the game time provided is not game time taken from the game, but rather real time without the transition screens. Actual in-game game time is inaccurate.