First off considering you are making a fishing game, lets take a look at games that are similar.
For instance, Fisch.
So lets begin with the game page its self as it can help a lot.
First off remove all those tags from the description, it makes your game look desperate.
Especially with the tags you used, it makes the game look like its not even a game and its probably just some poorly made obby.
You might also want to remove the other language(s) from the title and description.
From that lets take a look at Fisch, their thumbnails look much more appealing then yours do, as they seem to be GFX’s, along with that, they show off some cool looking things you can catch, which makes it appealing towards certain groups of people.
Another thing I can see is that the build styles dont match at all. I see some stylized barrels and then I see a dock with roblox materials, the look of a game can impact the performance of your game, so having a matching style might be something to consider.
Now to actually making it popular I recommend advertising it, whether with youtube, twitter or whatever you choose, just gain an online presence.
Another thing to note, that whether you like it or not, you are now competitors with Fisch, what does that mean? It means your game now needs to well, be better then fisch, for instance, why play your game over fisch? What new ideas does it bring to the table? Along with that, why does it look better than fisch? (it doesn’t right now so you might want to work on that.)
Dont take this as discouraging, but you are kinda going against one of the biggest games on the platform, so overall I just recommend looking at how they did it, look at what people dont like about fisch, take some of your own original ideas, and make a game!
Also please remake the badge icons, I beg lol.
Best of luck~
~ Frodev