Hey, neat! I'm also writing about time spent in a facility, and memories in my case, instead of dreams, but likewise of their effect on relationships in the present. I'm really interested in reading how you approach yours - I can already see yours is more neatly drafted out than mine so far! Your stat system also looks neat. I think mine will likely be quite a lot more linear.
Layout - I've also found that even with a simple flow, Twine arrows get messy quickly. You've probably found this already, but I both appreciate and find v. annoying how in Harlowe 2, (goto:) macros don't draw an arrow. Great if I want a link not to throw a massive frickin line across my whole story, but a pain if I actually want them visually linked. (I've resorted to hiding [[thingy|whatsit]] links behind (if:false) macros in order to trick Twine into drawing the lines...)