Glitch with the blocks

The game is fun but theres glitches for the blocks. Sometimes its hard to move them. It takes a couple of tries to have the doctor move back and forth a couple of times to then be able to move it. At times the blocks dont even show a pattern to unlock an electrocuted door. Its like a dark block missing a color since its not supposed to be black. It would be great if the issue was fixed.

DAVID SZETO about Doctor Who: The Mazes of Time