Use the arrow keys to move the letters around, don't let them fall in pits or burn in lava. By the way, if you're wondering what's up with the repeated letters, R spelled "HOLOGRAMS" with his gems, causing holograms of two A's, N, and C to appear.
Credit 2 Every1, especially @griffpatch for the game, @AlfabetonsOfficial for the base of U, @PhonicLover44 for the sprites and the original project, and Mike Salcedo for Alphabet Lore.