The game is good, the gameplay is there and it's playable.
The letters mechanic was very innovative, still needs some polish, because it can get frustrating real quick.
The game is very hard, even when you get the concept.
The moments when the letters change are not signalled enough, i sometimes push a button only to see the letter's changed.
But the graphics were beautiful, so it would be a very playable typing tutor game.
And it's actually quite devoid of bugs, which is very appreciated, especially for a gamejam game!
Good work!