The uploading-duration probably refers to the file's size e.g. a textbased one could get shared more quick and requiring less space if offered as download, while I like that projects getting coded by a 13y developer, btw: let me know in case you'd be open for a translator (english to german language) in text, no voice-narrator.
I'm also pre-typing the descr., uploading banner-image, setting keywords for this game & saving it as draft until I'm publishing it. Saves some mins if you'd plan to release your game on a specific date, I guess?