Happy: notably fitting, effective, or well adapted. felicitous "a happy choice"
Lark: Something done for fun, especially something mischievous or daring; an amusing adventure or escapade.
Tired of annoying games with a hostile user interface? The Happy Lark offers four ways to play, ranging from friendly to challenging, and including an informative alphabet game featuring Arabic, Cyrillic, Devanagari, Greek, Hebrew, Latin, Futhark Runes, and the patterns of the Morse Code.
When you win, you're shown one of thousands of prizes, including astronomical images, definitions from Ambrose Bierce's satirical "Devil's Dictionary" (1911), illustrated pages from "The Rubáiyát of a Persian Kitten" by Oliver Herford (1904), "The Complete Works of Josh Billings" by Henry W. Shaw (1876), "Wit and Humor of America" edited by Marshall P. Wilder (1911), and entries from the dated but interesting and potentially useful 1916 "Toaster's Handbook of Jokes, Stories, and Quotations" by C. E. Fanning and H. W. Wilson.