Well, that seems quite polished to me! The visuals are pleasant, and the game have great feedbacks.
However there is a winning strategy to 2048, and I must admit that knowing it makes every level feel like a clicker game. (the trick is to alternate betweenright and up, and left if it gets stuck) I think the developers of Threes (the game 2048 took inspiration from) explained in a blog post how they've dealt with that issue.
Anyway, it was an interesting and charming remake of 2048. :)