"Pixel hunting" is having to place a portal in a place where you can't see the surface fully, only a very small amount of it. The dead point I mentioned is in the 3rd map, and I commented there.

it's a question of taste, i guess. i know about people who has enjoyed them, and other like you who hated them (more of the first ones than the second ones, who knows why).
anyway, i tried to not making timing puzzles (only the second map has them, it was deliberated). pixel hunting: i don't know what it is but i guess it, and if is that, it's not needed :S in any map. dead points: the maps has been tested a lot, but if you find any dead point, tell me and ill fix it.

I've had to rate your maps negatively. Your designs are at odds with what I consider to be good puzzle gameplay. Your maps, each, contain at least one of: very high speed or timing requirements; pixel hunting; and the player being unable to progress due to player error.

I strongly recommend any players that have disabilites to stay away from these maps.