Advice: You need to make longer games, simply put.
You're an excellent artist. Your style is amazing. The problem is when you make a game they can be finished in a very short time.
Anybody that was ever interested in your game will lose interest in playing other games because they don't have a reason to get invested.
If you make longer games, or make one game and update it, or better make one game featuring all of these characters and add updates it will actually attract more people.