Solid start. I think the game is too easy. I think it makes sense for the answers to the riddles to be easy, but the puzzle could be harder.
One possible option, is to have the columns of letters be arrangeable. If they are out of order, the player will have to unscramble and decide which columns must be used for which letters.
At the moment, its not actually a puzzle, it's just a convoluted way of typing in the answer to a riddle.
Keep it up!