Edit: Changed Header from "I feel like an idiot" to "A warning to new players - Each room has a "Soft Timer" and added aditional information about the ghost as a warning to new players.
So after doing some reading and watching a few videos on Spelunky I decieded to purchase it. I finished the tutorial and headed of to to go exploring.
I was having a great time jumping around, cracking a whip, cursing a bat and collecting loot. Then it happened,at 2min30sec HE shows up, The ghost. For the new players out there, this guy is instant death on contact. He can pass thru solid walls and track you throughout the room. He does change any gems that pass thru him to Diamonds and some in this thread have said you can dodge him but be warned that there is no way to kill him.
If I had seen or heard anything that indicated that there was a timer, soft or hard, to each room I would have not purchased this. :( HERE
is a link to the free version of Spelunky so you may try it before you buy it. I personally ran into a bug with the controls, but some here have said they corrected it by remaping the controls. I have not personally tried it.
Edit:Now that I ran into the ghost I see posts everywhere about him. Wish I had seen these before
Edit: I recently added the link for the free version to help folks better judge if the ghost would be an issue for them.