As a solo dev, this is how I boost my chances of making a hit:
1. Play a ton of different Roblox games every day
2. Find something you actually enjoy, would spend money on, and could realistically build in like two weeks
3. Keep playing and breaking it down until you really get what makes it fun at its core
4. Then remake it in your own way, mixing in your own ideas
Every time I didnβt follow this, the game flopped.
Every time I did, it worked