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Rigorously

i just finished it and i liked it :) but now as i played it a second time i am wondering what to do with the laser ?? when i played it the first time, i missed that passage obviously but finished anyway? can you explain that?
and what to do with the red gel ? didn't need that, too :D

What sardiskan just said.
Bad design. The apeal of Portal puzzle is not to figure out "what does this button do", but "how can I use it to solve puzzle".
It is possible to get stuck in exit room without a way to get back (Areial Faith Path is one way ticet).

Do not really like this one. I'm just really running around trying to remember where everything is in my mind as I can't see the entire level. A good level allows me to see basically 70% of the level from my current position so I can think about what I'm doing. I've yet to figure out how one gets to the exit.

removing signs and such does not really make the puzzle harder on thinking, it mainly makes it less requiring of thought, all I did was run around and push buttons. I couldn't plan for making the full puzzle because I couldn't know what would happen once i had pushed it

Most of the puzzles are confusing as hell. I'm even sure I've done the puzzles via exploits and only realise the intended solution later.
You say Valve's puzzles are too simple, but that's because they are appealing to casuals via the story rather than gameplay. Your removal of signs and indicators on what switches do just seems to be a lazy way of slapping on "difficulty", however.

That said, I gave it a thumbs up as I liked the rest of the puzzle after activating the white gel .

I must agree with YM, what I like about Portal is the activity of solving puzzles. It felt more like messing around until the map suddenly ends. I have no idea what half of the buttons do, or if I need the laser/light path/gel/beam, I don't understand any of it. The level has been beaten, but not solved.

Thanks YM for the criticism. Honestly, its kinda exactly what I was going for. A lot of what people didnt like about portal 2 was its very blatant and obvious answers. This is a different way of solving a puzzle then just, proceed to next room, follow the arrows. Their isnt signs everywhere, its up to you to figure it out. It is extremely hard, though dont let that full you.

A labyrinth of death lasers and water pits. The challenge is to figure out the correct path? I have no idea where -any- path leads because I can't follow any path more than a few blocks before I have to change course. You can't tell what any of the switches do, nor see anything changing as a result.
I hate to say it but this is a perfect example of 'what not to do'.

I managed to beat it in 1,5-2 hours, nice work

Im a horrible judge of difficulty with my own work. So if you are having problems, I can give you hints.