fixed bug that allowed overlapping block to be clicked through an empty cell
Merge branch 'master' of https://github.com/danapczynski/puzzle_game_opus
Revert "fixed bug that allowed overlapping block to be clicked through an empty cell"

This reverts commit afe5c9310ef13d70c94bb75f1722ef29538d0a0a.
fixed bug that allowed overlapping block to be clicked through an empty cell; fixes #1