A take on the classic line drawing / connecting puzzle game. I've always enjoyed these a lot. It seems you got the main concept down. If only there were more levels / some real puzzles. But then puzzle design can be quite difficult.
That being said you said you wanted constructive criticism. Obviously some nice clicky sound effects would add a lot :D. But yeah all in all more levels / proper puzzles. There are some fantastic talks about puzzle design hit me up on the discord and I can send you the links :D.