So not long ago me and another person have released a game which is based around you destroying blocks like it destruction simulator but round team based style.
The average playtime is around 4-5 minutes from a normal person which I’m return doesn’t mean they will come back to the game again once they played it once.
I never really had to encounter this issue but if anyone has a idea that can help please tell me. Here the game link Explosive Mayhem - Roblox
Thanks for reading 
One thing I would change is the title. The title is too long, I would change it to something simpler and catchy so it’s easy to remember and so the players won’t forget it.
I just tried it and, first of all your game has a good concept and is alot of fun. And I don’t see why players are not coming back. You have all the things a good game that will hook players so maybe give it some time or advertising it might work well.
Hey there! I’m really enjoying what you’ve gotten going here, especially with the objective of destroying the most bricks. Here’s a quick image explaining that, although more of that stuff is elaborated on within the video at RDCEU18.
One thing to consider is the Core Loop game mechanic which you can use to ensure players will come back most sustainability.
I’d strongly suggest you take a quick look at the session with @2blox2quit at RDCEU18 below which I’ve timestamped for you to watch, it goes over everything you need to know about when it comes to Planning & Designing a Roblox Game.
I wish you good luck with the game, looking forward to seeing what you come out with this!
The likes and dislike difference is getting smaller while favorites are getting bigger 