Well

If it is under construction you won't mind some constructive feedback.

1. Add more words to your list. This alone got really booring really fast.

2. Ramp up the difficulty, I couldn't notice any difference in level 5 and level 1. At the rate things were going I could be doing other things and still not forsee loss in my future.

3. Add a penalty even if just a small one either to score or remaining time for clicking the wrong letter.

The game is OK ish, and does need some fixes. In all honesty I don't know how fun a game like this can actually be, it doesn't seem to have much of a hook, but that is just my oppinion 3/5 6/10. Good job though I hope the next version is better.

Okay

What can I say about this game? Not bad really. Very good time waster. Like you said, it is still under construction. I did notice that words like "Papers", you could go back and select the already selected P, then move right onto the other letters without concern. So that's one thing that needs fixing. Other than that, good game.

Preloaders. And good gameplay.

Might sound wrong from a guy who just made a snake clone, but anyway.
You should probably add a preloader, and something to make the game fun, right now it's boring after first word..