All difficulty and life settings are allowed (no fast/autofire).
Please verify time to the nearest second from START button hit to the moment the words 'NUMBER OF HITS' appear after a given Challenge Stage.
For standard submissions, simply finding these two times and subtracting the START time from the 'finish' time is OK.
If you need help determining a time before submitting, just reach out in Discord. Splits for Galaga on Livesplit are also available for easy measuring.
The goal is to go all the way through Challenge Stage 8 (Stage 31). To measure all runs on one track, for those do not manage to go the entirety, add 1 minute for every Stage you do not complete (e.g. you die on Stage 21 with a time of 10:21. You didn't play (31 - 21 = 10) 10 stages, so add 10 minutes for a total time of 20:21.
Also consider tracking your times for all Challenge Stages and submitting to speedrun.com at https://www.speedrun.com/galaga#Challenge_Stage as well. No time needs to be added for the Speedrun.com submissions.