Hi, welcome to the forums!
We don't support widescreen right now, but it may be possible to add it. The problem is that it would affect the layout of a lot of things and involve a lot of time adjusting things / replaying the game to make sure it works properly everywhere.
There may also be weird issues that arise from being able to see more of the level than you were originally intended to.
I'd like to experiment with ti sometime, but I think it would be a mistake to add it now because it would probably be pretty hacky. I could see it being a patch later though, if it works out well enough.