Hey there, I'm really enjoying the game! 

One thing I can't seem to figure out is how to get past the spikes in the cave. I'm trying to open a door with a crystal on either side of it. Got the power from a crystal in an area to the right of that room and plugged it into the righthand crystal. I can see a crystal in the area on the left but it's blocked by at least two sets of spikes and I can't figure out how to get past them. I've walked back through the whole area back to the fireplace where you start at least twice and I have no idea. There's nothing that gives any indication as to what to do. I also can't figure out why you can pull the power from/repower some cystals but seemingly not others. At any rate, if you could give me a hint on what to do about those spikes I'd appreciate it. 

Hi there,
For the room w/ the blocked off crystal, there's two paths to that room. If you're in the central chamber and head left, you'll be in a room with a small body of water, and three exits. One to the right, which takes you back to the central chamber, one to the left, which takes you to the room w/ the blocked off crystal, and one to the bottom, which is the path that loops back around to that blocked off crystal. :)

Thank you for the post! I've been concerned about the caves, so things like this help guide me in what to change in the future.