a and d to move. space to bark. be warned. when you press the green flag annoying dog will go mad.stare at it for ages and keep space pressed down. this will send you absolutely mad. see how long you can do it for. if the colours hurt your eyes / you are a wimp and want to back out then press 1 to erase all pen marks.
Thank you Undertale by Toby Fox for the gist of this and the characters and the background. you get this background when you complete true pacifist if you were wondering.