Little critters float down towards your castle, hanging from balloons marked with runes. Draw a rune anywhere on the screen and every balloon wearing it pops; a critter with no balloons left drops out of the sky. Pop several at once and keep a streak going for bigger scores, because every level brings faster critters, more balloons and new runes to learn. Three critters on the wall and the round is over. Free, no sign-up — play right in your browser.