Left, up, down, right, and spacebar keys. Check out the strategy guide (not that there's much strategy) here: http://www.koopatv.org/2017/08/the-wonderful-1237-guide-lindsey-graham.html
Play the whole The Wonderful 1237 here: http://www.koopatv.org/2016/12/play-the-wonderful-1237-game-here.html
