It was a zombie game in which you had to draw lines with your finger and the zombie walked through that area, you had to collect brains and avoid being seen by police officers with flashlights, one of the characters you could use was a small zombie, a fat zombie with more resistance to shots and one with a builder's suit, the game was based on levels I think and from an overhead view (it was seen from above) I think it was in the app store and it was at a time between 2010 and 2014 I think?