Feel free to use the UI as the sole measure of quality, but if that is your stance, you should probably seek a different audience.
But I'm not necessarily trying to make a claim that it can't be done in Haskel. More that I have not seen it done. You can claim that the final polish of the original is irrelevant, but I find that claim hard to believe. Especially since I have yet to see an example that has said polish.
Sadly, I don't know how you would really go about proving that one way or the other.
I'm not going to claim that the code alone is as "pretty" as the Haskel version, but I see no reason it should have exploded to be much larger. I may have to take a look at how other folks are doing this.
(Code is currently at https://github.com/taeric/2048-Explorations. Will try to prettify and publish the org file that accompanies it.)
I'll hopefully have more to add to the conversation after I try this game in a language. At face value, I am not at all clear on how this will take 90 lines of javascript. That just seems extreme.