One of the character abilities required to unlock certain areas in Lego Dimensions is Hacking. Using the hacking ability on a hackable item takes you to a small mini-game, the objective of which seems to be to stand on a number of pillars (and take a few second stop unlock them) whilst avoiding the monsters.
I can get to and unlock all of the pillars on the normal, blue path around this level, but I can't work out how to possibly get to the last one that's floating on the transparent blue/red squares.
The pillar that I'm trying to get to is the one highlighted in the middle of the far-right edge of the screenshot above. The game won't seem to let me step on the transparent squares, or interact with the red monsters in any way (like jumping on them), none of the gameplay buttons seem to do anything (other than the "Jump" which makes monsters turn around, but that doesn't seem to help here).