I checked out the game and I will say it is decently made and there can be improvements. First of all, the UI overall seems a bit lacking. The whole shop UI seems a bit simplistic for this day and age of roblox. It would’ve looked great back in like 2012-2014 but nowadays, big games usually have the smooth, eye-catching and simplistic UI. Also, the maps seem a bit big and given the amount of time the shark has to catch the remaining players seems too small to actually catch everyone. I’d recommend the timer being on 200-300 seconds (maybe longer), that way the shark has a chance to actually catch everyone if the server had 10 players max (or make the maps smaller).
The classic gamemode seems a big bugged. Once all players reach the other side, it takes a while before the game actually recognizes that fact. I also believe that once a player has made it to the other side, it should prevent them from moving just so everyone would know who already made it in. Since players could just walk out after going in, it could be confusing on who already made it to the other side or break the game potentially. I also believe the countdown timer and all the other text at the top should be black with a clear box background. Having white text with a black outline on a white background, in my opinion just doesn’t look good. You can even leave the white text with black outline, but make the rest of the box invisible so it just shows the text which would make it look a lot better.
For the reason your dislike ratio is low, that could be that players find the gameplay a bit slow. You could increase the walkspeed of the minnows and shark a bit so that it speeds movement up and it doesn’t take forever to walk around the map. I also see the problem that it requires 2 players to play. If someone were to join, they may dislike due to not being able to play. The only solution I could possibly see is to add a bot shark that only shows up if one person is in the server. That way, that one person can play the game while waiting for real players to join. Hope this helps.
There was a popular sharks and minnows game I remember playing in 2012-2013 and it was a fun. It’s good to see the game created again.