Apart from the bee "cheat" isn't it possible to :
Grab extra life,
kill everything on screen,
Grab new extra life and so on, in a lot of games? Therefore making the challenge just another "scripted event/ I got the most time"
For those with a lot of time I'd recommend a shooter like battlesquadron or IK+ both games a reasy to cheat on tho :/ so a better idéa would prol be best time in Nitro L1. No savestates allowed