The first chamber is pretty straight forward. The second, a little harder. The third chamber requires remembering and looking for those portalable panels. The last one only looks easy. Although themed with stairs, the puzzle consists of cubes, buttons and tractor beams. Medium difficulty or slightly higher. Just remember not to run a tractor beam funnel up into a cube dropper when dropping a cube. This will cause it to get stuck.

Click here to download Stair Upwards

Click here to download Stair Upwards

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You've hit the nail on the head again ^^
It started out pretty straightforward, but settled on a really nice difficulty, ty

Thanks. And my usual "to cube or not to cube" bring it with me situation. I try to make it quite evident unless it's the companion cube.

Tricky map, had me thinking for quite a while. Because the video is actually 28 minutes long, I sped the video up.
Here's my blindrun:
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Is my solution intended?

5/5. Hoping to see more maps made by you.
Cheers!

In the second chamber, I thought "ooooooooh nooooo, he tractor beamed a cube back up into the cube dropper". As you can see, you need the reflector cube from the first chamber to be used in the second and put it on the first button you see when you get there. As you noticed, the reverse tractor beam will bring it to the second chamber. But the solution is to jump on the beam and ride with it, and grab the reflector cube, jump off it and back down to the first button (the button that changes polarity to "blue"). It's much easier that way. Once the beam is changed to Blue, and the small fizzler below the cube dropper is de-activated, you pop a portal below the cube dropper, and one on the angled panel. When the cube drops, it flings out the angled panel and gets caught in the blue tractor beam. The rest is obvious. As for the last part, I'm going to have to fix that one. You weren't suppose to be able to see the ceiling of the very last chamber from the one before it. I'll upload a video soon so you can see the intended solution. Especially the third chamber which is probably the most complex.

Thanks for sharing.
And the background music speeded up sounds like a robot disco dance party.

Okay, the map has been edited. The exploit I mentioned of getting to the last chamber has been rectified. A fixed fizzler field has been added to the entrance of the last chamber. Give it another try if you wish.