Controls could use some tweaking.
Also, don't know if you've noticed, but the use of Times New Roman ANYWHERE in a flash screams either slipshod or lazy (sometimes both). You may want to divert people's impressions of this game away from that.
Also, the choking sound for the death block is pretty unpleasant. You may want to just go with a nice eraser block instead, with a rubout sound or something. Background music would also be nice.