Well, it seems as if you did almost all the requests for the past game. Impressive, your a step ahead of me.
Loop the music, prevent the music from playing while it is playing, add a level counter.
Try mixing up the border colors. What about red, then blue, then violet etc.
I'm glad you made the lines straight. Just work on the buttons.
Start working on a bigger game. Give it a week or two, it's not good enough to simply make game after game by day. And this one shouldn't be a maze. Those are too easy. Try a game that goes under a category besides puzzle, k?