One of our kids was working on letter recognition, so I made Liberty Letters: March to Victory. It is a browser game with a friendly, Revolutionary War–themed storybook scene.
A child hears a letter and chooses it from three large tiles. Each correct answer moves Liberty Company farther across the scene. A wrong answer does not take away progress; the game asks the player to listen and try again.
I also made a printable letter-recognition activity. The PDF has letter missions that can be used away from the browser.