Yes, I played the Practice Room, but if not finding the way above the gel on the floor, it seems to stay difficult to reach there or even use it at all. I'll give it another try another day.

Seems, we have the same issue with jumping :)

Well, if you would tell me, how you solved to bring the cube through the fizzler, back in the first chamber, I could tell you, which way you used. I barely can believe, you did the ninja way before already, as the normal way should be an quite easy one for someone like you.

If you've played [url]Practice Room 7[/url] then you know what the receiver on the ceiling activates. They're right next to each other; you can clearly see both of them in one of the screenshots above.

Yeah, every time I get too confident and stop looking down before I jump gaps it goes badly, so I just got into the habit.

I did try the ninja button in Back from Infinity but it didn't seem to do anything. I guess that means I've always been solving it the hard way.

Phew, I got the laser cube and hit the dot receiver. But ... what happens? I'm too lazy right now to go through every point of the maze, looking at every spot, what should have changed. I haven't spot the destination yet. There is an indicator missing!
Funny fact: meanwhile I've learned to jump across gaps, so they're not the problem (any more). I do it like you now I think. Facing the floor and on jumping looking up.
And as you now have a different lightning, the gap to the infinity ninja button shall be piece of cake for you. ;)