My first puzzle game: need suggestions

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I want to develop a series of puzzle games with a new concept that lets you put your own music.I've finished my first one and I would make use of your next suggestions, either to update this or to apply on the games to come.PYOM Gomoku Puzzle - Apps on Google PlayInfinite map Tic Tac Toe with strategy learning and puzzles.play.google.comThis is a TicTacToe variation with infinite map and 5 in a row. Also known as gomoku.