There will be moderation that will take 1-2 days, if it is approved your game pitch will appear on the list for approx. 30 days.
After that your game pitch will be stored permanently and randomly displayed as "Random gem". Which means that you will get an audience for a long time.
The content should be friendly to as young as age 13.
Your game pitch will have equal chance of appearing on top as the others, as the list is shuffled with equal probability.