You can paint anything on tiles, it is like different layer.

Seems like this can solve a problem

Layer1(bottom): Will hold a tiles board, that is basically will serve as a background, like so: https://dl.dropboxusercontent.com/u/8655042/grid.bmp

but I still need to indicate which tile the player's finger on, like so: https://dl.dropboxusercontent.com/u/8655042/grid_touch_down_at_cell_1-1.bmp

so, to solve this I need a tiles board where each tile will have a touch event handler?

Layer2(top): Will be used for drawings on top of a tile board (layer1), like so: https://dl.dropboxusercontent.com/u/8655042/grid_base.bmp

Am I correct?