Player Visitor Limit Good Or Bad

I’ve had one of my games called “Be Crushed By A Speeding wall 3” for about 3 months now and it always had a max player count of 50. It had a playtime of around 9-10 and I want to get to the next level of a big game such as 11-13. I changed the max player count to 9 because the game keeps maxing out hat around 7-9 and then ppl leave until there are about 5 ppl. Do you think this will help or hurt my game?

Here is a link to my game if any of you want to test it out and see if it would help/hurt by the game format. (17) Be Crushed By A Speeding Wall 3! - Roblox

I actually think 15 could be a good number.