An evil clone of Gabriele Cirulli's 2048, which is itself a clone of 1024, based on Saming's 2048 (also a clone).
2049 is licensed under the MIT license.
My changes took 2 minutes. If you think that's worth something, I accept BTC donations to 14chXCVGQwL9hTb8u3vfBWRGg8eKxtCuc5. The original author probably deserves more credit than me