I figured it out too. Took me a while!
n pbecfr vf vaibyirq
I was not able to figure it out without using your hint. After that room I was able to finish the area within 10 mins. For me, that was the one puzzle that came up short, as I do not think I would find the solution on my own. The rest of the game is great! Now I'm just stuck on the 5,10 star. I know where to go, I just don't know how to get there...
Turns out I did not know where to go, but I finally reached it. I now have 100% completion. Great game! Here is a hint on where I got confused, as always encoded using rot13.com:
lbh unir gb trg gur fgne ng 5,10, abg sebz gur raq frpgvba va 7,8. gung vf na rkvg bayl, hagvy lbh unir nyy bs gur fgnef.