yeah, you did kinda ruin it. the whole game is an evolving puzzle, but not if you say how to do it.
You say that, but the actual difficult bit is after the rocket has hit, you need to use all the skills you learned during playing the game to launch yourself around the map and get the pieces to kill it...
ON A SIDE NOTE
That camera shy must be solid, you need to destroy the camera in the first room, but you have no portal gun D:
Hmm...
i really liked it but for it's length it not worth the money unless you orange box it
Yeah I got portal by buying the orange box ^^
It is a good deal getting the orange box

Buy it and get portal too!!
I'd rate portal around 85/100
I drop it down because the last boss was too easy and the achievements are hard
I'm not saying they should be easy, but as camera shy has proven it is bloody difficult!
The level design is solid and well mapped
You should listen to the developers comments
They are quite interesting ^^