This is an extremely tremendous game. I'm completely hooked.
If there were any possible future updates, I'd like to see if there are more maps and different styles, the ability to adjust movement speed, line thickness, RGBA color, size, and support for more buttons (laptops don't have mice).
The only problem now is that: Like, lines may hinder the gameplay, and the color of the number 7 is too hard to see. Movement can be a bit sluggish, and it might not be necessary to draw the entire map if the map is too large. It could provide an option to only draw nearby shapes.
And another piece of advice, sometimes sound feedback has a big impact on the enjoyment of the game.