itch.io

Hmm... I think the key word for your game here  is "hyper casual" because it looks like SliceGo only focuses on the slicing mechanic. I think your best bet is to find people who like hyper casual games FOR being hyper casual, not just because they happen to have played a hyper casual game once before. Chances are if they like those games and play a lot of those games, they'll want more of the same. Maybe you can find them by browsing hyper casual related  games, webpages, forums, Twitter accounts/Tweets,  discord rooms, etc. the list goes on. Once you learn to find them, oh man, it gets fun. You can ask them for feedback because they know more about those types of games than random people on the internet and with feedback you can refine your game to suit that kind of audience and maybe even give it a price. Good luck!