Killbo is a word game.
It allows you to score points by connecting adjoining letter tiles to form words. The longer the word, the more points you score. There are also bonus words and multiplier tiles which allow you to score even more points.
Once you use a letter, it is replaced by the next tile incoming from around the edges. You can get to these letters immediately by using the “skull and crossbones” button to kill a tile and have it replaced. If you’re really stuck, you can shake to get a whole new board, but be careful, you are penalized time for killing letters, shaking, and if you put in a phony word.
The game is easily addicting as you try to beat your previous high scores, get the longest word, and get the highest scoring word.