Lots of flaws. Good concept, though.
As I said in the subject line, there are just too many flaws for this to be a good game. It's like it's a draft game, but then why upload it at all until you've done some BETA testing?
My problems were that you really don't need two columns, as the control scheme is so slow you really only get time to build in one anyway. The dragging of the letters is slow, boring and tedious. If only we could just type the letters we see to get them to appear in our column to start making words.
This game could also use some powerups, etc. I think what you are sort of going for is something very akin to Typing Maniac on Facebook. Go try that game, and you'll see how it should be done. Good thoughts, and good start, but you need to do a lot of work.
One final thing is that words that aren't real or that are foreign are accepted, and then there are some other words it doesn't recognize. You need to make it clear what dictionary or word set we can use. In addition, for a word game, I'd expect the whole thing to be a little more polished. For example, the tutorial screens alone had tons of spelling and grammar mistakes that give your game an overall uncredible and unprofessional feel.