7,21 SOS
Not sure which part of it you're stuck on, so here's the answers to both puzzle parts needed to exit the room. If it's the star your stuck on, I'm at a complete loss on that one too.
Rot13, just for variety this time ;)
The kitty-conveyor (I assume this is the sticking point - at least it's the part that took me a long time until I just stumbled onto it):
Fgrc bss gur 6-synt, fgrc onpx ba gur 6-synt. Jnyx fgenvtug bagb gur pbairlbe oryg. Fgrc vagb gur ragenapr ghaary naq onpx gb ergevrir n png. Erivir gur png. Hfr gur gjb pngf gb chfu gur qrnq png bagb gur vpr.
The 0-flag stack:
Gevttre gur synt naq qvr. Chfu gur obggbz obhyqre evtug, chfu gur gbc obhyqre evtug. Trg ba gbc bs gur fgnpx - vg'yy chfu lbh hc, fnivat lbh gur bar zbir lbh bgurejvfr arrqrq gb znxr vg gb gur rkvg.
