Spent over 90 minutes on this level and I cannot ♥♥♥♥♥♥♥ do it. Any hints?

At the beginning of the game I noticed that leaving some puzzle rooms doesn't mark them as complete and the red cube counter doesn't increment, at some point there were not enough cubes for me to progress. I checked the Profiles page and all the save slots were empty. I believe I played the demo for this game and can only assume that it's been saving into a demo profile or something like that. Creating a new profile solved the issue (at least for now)....

I love the mechanics (took me a while to understand how the notations for "arrows" are), but I like the progression in the features and the difficulty... I stopped after gathering the 4 red cubes to open the door. The possibility to reset a "level" (aka "unstuck") and the "undo" features are great and I admit to using the "Z" feature quite a few times. Unfortunately, in my view, an optional hint system is a necessity in those types of games, in case player hits an "unsolvable" roadblock... sometimes steppi...

If you collect the cube, run to the very bottom of the area (on the floor) and then re-enter the puzzle space and hit reset, the game will still consider the puzzle completed and let you keep the cube. Game's generally been good about preventing this but this seems like the one place where it fails to catch the issue. Coincidentally, this is the only puzzle I haven't solved yet because I did this on accident and haven't been able to figure out the actual solution since. Oops. EDIT: Okay I figured it out i...

The blue platform on top of the long staircase doesn't reset with the rest of the level when you hit R.