tested with 21, 201 and 41 markers. 201 gets the draw to work really slowly. with 21 and 41, it seems to work fine. I'm curious whether it will work decently on a slower phone (using Nexus 4 now). Also locked the orientation to landscape and solved the issue I previously had - the overlay was not drawing the current player(then it drew it with an offset - solved this second one with boundCenterBottom)