A boring autoscroller. The only thing to do in this situation is show off as much as possible!
In a warpless single-segment run, it saves some time to avoid all flowers and red coins to save time from the score tallying at the end of the level. Holding forward into the goal ring while not having collected any flowers, saves 2 frames over just fluttering into it with the screen scroll without any directional inputs.
It is highly recommended to exit 1-5 with six eggs as you'll be using them to help close out World 1.
Since getting the save ring takes time, the optimal strategy is to use only star clouds and red eggs to obtain 30 stars.