Kept me entertained - that's for sure -- and just on the *cusp* of beating it. As I said in the video, I imagine this was a level affected by physics changes over time. Still... it's apparent from the video that it's still *technically* beatable... so...
I think I'll pop back with a previous build of the game and give it a run-through there, too.
Warning: Full explanation of solution inside. (Like, literally with arrows showing where to go and when to charge, so if you, the reader, plan on checking the level out in an older version, DO NOT READ!)
(Actually, I just realized that if someone bought the game recently, they wouldn't have had access to any earlier versions...)
You are indeed correct on the physics changes. This was actually supposed to be a relatively easy level:
This screenshot was taken in version 0.5, where I went and checked that the level is beatable with this solution. It appears that this level works in 0.4
The level originally was to be won by going roughly back and forth. Additionally, the arrows/lines were intended to be partially (but obviously) misleading; a small trick/red herring. Coincidentally the "new" 0.9 strategy followed them almost perfectly.
The background tiles I intended to be just that - background. Because they are now conductors, the electric fields were affected significantly.
This level also was based on interactions between electric/magnetic fields. For example, the small charge while going left in the red magnetic field has subtle but useful effects. Additionally, one can go from the right side of the center positive conductor to the opposite negative conductor by holding charge+right, forming an interesting curve.
Edit 2: Hah, I have 3 versions of TES open for this (0.9, 0.8, 0.5). Made even more difficult since 0.5 still had the 3 level editor page bug
Edit: Oh, and reread the video description...
Edit 3: Perhaps you should make a list of all versions where the physics changed, to more easily distinguish "hard level" from "easy level made impossible by a change".
Edit 4: ...Andy.
The level is not
hard in 0.9. (Spoilers for 0.9 only)
Just a large-ish screenshot:
The vertical block of 3 positive conductor tiles.