I think the idea is fun and the endless runner mechanics work well, the addition of falafel throwing adds something extra, but I found it difficult to hit the little guy I was chasing. Not sure if you are going to work on it anymore, but if so then I have a couple of suggestions if that's OK...?
1) It would be good if the collision boxes on the red obstacles was a little smaller (especially near the corners), to give the player some margin for error and give that 'near miss' feel. Be good to put some rock graphics or something on them too
2) The story mode is a cool idea to give the player a goal other than just a high score, but it might work better if there were different stages where you had to get back a different picnic item. That way each stage could be shorter and you could catch the guy quite easily to start with, giving a sense of achievement.
Anyway well done on finishing!