They're definitely not super easy! The puzzles will give you hints in the game each time you get them wrong, and there's a full walkthrough in the downloads section, but I can definitely give a few hints here too!
Paste these into https://rot13.com/ to decipher them. (Or you could do it by hand, with A=N, B=O, C=P. etc., but that's a bit tedious, haha)
- Name puzzle (room 3,4):
- Gurer ner gjb jnlf gb fbyir guvf chmmyr, ohg gur rnfvre bar vf svaqvat vg va gur ebbz. Vg'f jevggra va vaivfvoyr vax.
- Gurer'f nyfb n frpbaq jnl gb fbyir gur chmmyr, juvpu vf n ersrerapr gb bar bs gur uneqrfg nqiragher tnzr chmmyrf, juvpu vf sebz Xvat'f Dhrfg.
- Fryrpgvat vaivfvoyr grkg erirnyf vg.
- Pyvpxvat naq qenttvat bire gur pbeerpg nern (be cerffvat pgey/pzq-N) jvyy erirny gur grkg.
- Vg'f uvqqra haqrearngu gur qrfpevcgvba svryq.
- Gur fbyhgvba vf avxfgyvgfyrczhe, gubhtu avxfgyvgfryczhe vf nyfb npprcgrq. (Ehzcryfgvygfxva onpxjneqf)
- Gurer ner gjb jnlf gb fbyir guvf chmmyr, ohg gur rnfvre bar vf svaqvat vg va gur ebbz. Vg'f jevggra va vaivfvoyr vax.
- Notches puzzle (room 1,4):
- Gur fbyhgvba gb guvf chmmyr vf enaqbzvmrq rnpu gvzr lbh cynl gur tnzr.
- Qba'g sbetrg gung n qvny ahzorerq sebz 0-3 unf sbhe gbgny abgpurf ba vg!
- Vg zvtug or urycshy gb qenj gur qvnyf (vs gurer'f bar cynpr va gur tnzr gung fhssref sebz n ynpx bs ivfhnyf, vg'f guvf).
- Lbh pna fbyir guvf chmmyr jvgu gur zbqhyb bcrengvba, be ivn qvivfvba jvgu erznvaqre.
- Zber fcrpvsvpnyyl, fvapr rnpu shyy ebgngvba bs n qvny ergheaf vgf inyhr gb 0, lbh pna qvivqr njnl gubfr shyy ebgngvbaf, fvapr gurl qba'g vzcnpg jung abgpu lbh jbhyq raq ba. Gur erznvaqre vf gur nafjre.
- Rknzcyr: Qvny N: 0-9 unf 10 abgpurf. Vs jr jrer gb ghea vg ol 1333 abgpurf, vg jbhyq pbzcyrgr 133 shyy ebgngvbaf, naq gura trg ghearq ol nabgure 3, erfhygvat va hf frggvat gur qvny gb 3. (1333/10=133 erznvaqre 3, be 1333 zbqhyb 10=3)
- Lbh'er noyr gb oehgr sbepr guvf chmmyr, trggvat vg jebat 4 gvzrf erfhygf va lbhe punenpgre gelvat nyy bs gur cbffvoyr pbzovangvbaf (nsgre nyy, gurer'f n znkvzhz bs whfg 100 pbzovangvbaf, fvapr gur znkvzhz ahzore bs abgpurf ba rvgure qvny vf 10), nyybjvat lbh gb cebterff jvgubhg fbyivat rvgure chmmyr.