this is a neat game, and i love the art style! the core gameplay does feel a little bit limited with what you can do with it, and i encourage you to try and explore more ways to make levels feel fresh if you plan to continue updating it.
and here's a little level i made:
[[8, 0, 0], [7, 0, 1], [7, 0, 2], [9, 0, 3], [9, 0, 4], [5, 0, 5], [5, 0, 6], [10, 0, 7], [10, 0, 8], [8, 0, 9], [8, 0, 10], [7, 0, 11], [7, 0, 12], [9, 0, 13], [9, 0, 14], [5, 0, 15], [8, 1, 0], [8, 1, 1], [7, 1, 2], [7, 1, 3], [9, 1, 4], [9, 1, 5], [5, 1, 6], [5, 1, 7], [10, 1, 8], [10, 1, 9], [8, 1, 10], [8, 1, 11], [7, 1, 12], [7, 1, 13], [9, 1, 14], [9, 1, 15], [10, 2, 0], [7, 2, 4], [5, 2, 8], [10, 2, 9], [9, 2, 15], [10, 3, 0], [7, 3, 4], [5, 3, 8], [14, 3, 9], [7, 3, 15], [5, 4, 0], [0, 144, 80], [8, 4, 4], [1, 0, -256], [9, 4, 8], [14, 4, 9], [17, 144, 336], [7, 4, 15], [5, 5, 0], [8, 5, 4], [9, 5, 8], [14, 5, 9], [8, 5, 15], [9, 6, 0], [10, 6, 4], [7, 6, 8], [9, 6, 9], [8, 6, 15], [9, 7, 0], [10, 7, 4], [7, 7, 8], [7, 7, 9], [9, 7, 10], [9, 7, 11], [10, 7, 15], [7, 8, 0], [5, 8, 4], [10, 8, 15], [7, 9, 0], [5, 9, 4], [5, 9, 15], [8, 10, 0], [9, 10, 4], [5, 10, 15], [8, 11, 0], [9, 11, 4], [9, 11, 15], [10, 12, 0], [7, 12, 4], [9, 12, 15], [10, 13, 0], [11, 13, 1], [11, 13, 2], [11, 13, 3], [7, 13, 4], [7, 13, 5], [9, 13, 6], [9, 13, 7], [5, 13, 8], [5, 13, 9], [10, 13, 10], [10, 13, 11], [7, 13, 15], [5, 14, 0], [8, 14, 4], [7, 14, 15], [5, 15, 0], [8, 15, 4], [8, 15, 15], [9, 16, 0], [10, 16, 4], [8, 16, 15], [9, 17, 0], [10, 17, 4], [10, 17, 15], [7, 18, 0], [5, 18, 4], [10, 18, 15], [7, 19, 0], [5, 19, 4], [8, 19, 8], [8, 19, 9], [7, 19, 10], [7, 19, 11], [9, 19, 12], [9, 19, 13], [5, 19, 14], [5, 19, 15], [8, 20, 0], [9, 20, 4], [5, 20, 15], [8, 21, 0], [9, 21, 4], [9, 21, 15], [10, 22, 0], [7, 22, 4], [4, 720, 432], [9, 22, 15], [10, 23, 0], [7, 23, 4], [7, 23, 15], [5, 24, 0], [8, 24, 4], [7, 24, 15], [5, 25, 0], [8, 25, 4], [11, 25, 5], [11, 25, 6], [11, 25, 7], [9, 25, 8], [9, 25, 9], [5, 25, 10], [5, 25, 11], [10, 25, 12], [10, 25, 13], [8, 25, 14], [8, 25, 15], [9, 26, 0], [10, 26, 4], [7, 26, 8], [9, 26, 9], [9, 26, 10], [5, 26, 11], [5, 26, 12], [10, 26, 13], [10, 26, 14], [8, 26, 15], [9, 27, 0], [10, 27, 4], [15, 27, 5], [15, 27, 6], [15, 27, 7], [7, 27, 8], [7, 27, 9], [9, 27, 10], [9, 27, 11], [5, 27, 12], [5, 27, 13], [10, 27, 14], [10, 27, 15], [7, 28, 0], [9, 28, 1], [9, 28, 2], [5, 28, 3], [5, 28, 4], [10, 28, 5], [10, 28, 6], [8, 28, 7], [8, 28, 8], [7, 28, 9], [7, 28, 10], [5, 28, 11], [5, 28, 12], [5, 28, 13], [5, 28, 14], [10, 28, 15], [7, 29, 0], [7, 29, 1], [9, 29, 2], [9, 29, 3], [5, 29, 4], [5, 29, 5], [10, 29, 6], [10, 29, 7], [8, 29, 8], [8, 29, 9], [7, 29, 10], [7, 29, 11], [5, 29, 12], [5, 29, 13], [5, 29, 14], [5, 29, 15], [20, 0, 15], ["Lock and Key", 0, 0]]