In terms of gameplay - there isn't much to be said since it's the classic 2048, and it works as it should with no problems so good job.
As for the looks, I would suggest you to google some good color palettes, it can really make a huge difference for the looks of the game. To add more specifics to alextro's ui feedback - I would say instead of word "Reset" you should make the classic reset circle with arrow. So just copy your "Home" button and replace the house icon with reset icon.