Not quite at the end, but two quick updates.
First, I figured out what the pink medicine does. It’s rather subtle, and exploits the fact the player is “looking through the eyes” of the main character as opposed to seeing them from the outside, like a standard third-person point-and-click game.
After growing the pink hair, referring back to this song the singing sword
TUM TUM TUM TUM
CATCHA BEASTIE WITH A SEINE, WOVEN STRANDS THAT FIT THE BRAIN…
TUM TUM TUM TUM…
I used the shears to cut my own hair off, then did USE HAIRLOOM to form a PINK HAIRNET. I am not sure what to do with it (you can’t even wear it).
Second, as a team of commenters figured out, the singing sword’s message of
THE SWORD CROONS IN A TERRIBLE FRENCH ACCENT, “MAY WE, MON SEWER, C’EST SEEBONE ENDEESH LOKAY SHOWN!”
while in the laundry room was a hint to “say” (“c’est”) the word “seebone” “in this location” (“endeesh lokay shown”).
This opened a secret passage going up, leading to a tower with a hedgehog. I could pick the spiky hedgehog up, and importantly, the description matched that of the queen having a hedgehog playing croquet. I had previously got a flamingo but was missing a ball: now I had both of them! So it was time to take both flamingo and improvised ball over to the queen and take her up on her offer to play croquet.
I admit I was heavily anticipating this moment — I have been whacking at the game for a while and kept wondering what the croquet game would be like. This made what happened next even more comical:
With Fortress at Times-End when I was talking about a good trap? This was a good trap. It hit the “participatory comedy” marks — it required the player to act to cause their own demise, it was possible to foresee ahead of time, and it had a long anticipation period beforehand. It is also kind of hilarious.
Unfortunately it also means I’m stumped! I’m willing at this point to accept ROT13 hints of any kind for the remaining treasures, how to handle the power outage, and how to handle the Queen.
Renga in Blue 
Happy to assist. I’ll whip up some Invisiclues-style hints shortly, starting with the power outage. (You’ve figured out a lot more than I managed to before I went in search of hints!)
There are three questions below with three sets of hints, all relating to the power outage. They form a sequence. I’ve rot13’d the second and third questions (as well as the clues) so as not to give away the steps in that sequence ahead of time. Also, if you manage to resolve with the power outage without reading all the clues, I suggest coming back and reading the rest of them (as otherwise you may be left puzzled about one element).
How can I deal with the power outage?
1. Ubj jbhyq lbh qrny jvgu n cbjre bhgntr va erny yvsr?
2. Jung qb lbh frr (hfvat gur synfuyvtug) vs lbh tb gb gur Znvagranapr Ebbz nsgre gur cbjre tbrf bhg?
3. Abg bayl vf gurer n pbecfr, jngre, naq n “zrygrq zrgny obk,” ohg gurer vf nyfb n “oybja shfr.”
4. Gur zrgny obk vf n shfr obk. Lbh pbhyqa’g frr gur shfrf orsber gur bhgntr orpnhfr lbh jrera’g noyr gb bcra gur obk.
5. Gur snpg gung lbh pna frr gur oybja shfr nsgre gur bhgntr zrnaf gur “zrygrq zrgny obk” unf orra zrygrq *bcra*.
6. Creuncf lbh pna erfgber gur yvtugf vs lbh ercynpr gur oybja shfr.
7. Lbh unira’g frra nal serfu shfrf, ohg znlor lbh pna svaq na npprcgnoyr fhofgvghgr…
8. …nygubhtu abar bs gur vgrzf lbh’ir sbhaq fb sne jvyy jbex…
9. …ohg znlor lbh’ir *urneq* nobhg fbzrguvat gung jvyy jbex.
10. Lbh arrq fbzrguvat pbaqhpgvir.
11. Bar bs gur fjbeq’f uvagf vf vzcbegnag urer.
12. Vebavpnyyl, gur bar lbh tnir gbc ovyyvat.
13. Svaq n craal. Nsgre gur cbjre tbrf bhg, oevat vg gb gur Znvagranapr Ebbz (jvgu obbgf naq synfuyvtug). Gura “vafreg craal.”
14. Jurer’f n craal, lbh fnl? Gung’f gur fhowrpg bs gur arkg dhrfgvba.
Gung’f nyy jryy naq tbbq, ohg V’ir orra rireljurer. Jurer’f guvf craal?
1. Lbh’ir orra va gur craal’f ybpngvba, ohg unira’g frra gur craal.
2. Gurer’f fbzrguvat lbh’ir frra (naq zragvbarq va n cbfg) gung lbh rvgure unira’g gevrq gb vairfgvtngr, be unira’g shyyl vairfgvtngrq.
3. Lbh unira’g erpbeqrq vg ba lbhe znc gubhtu.
4. Yvxr gur zveebe va gur Yningbel, vg’f na ryrzrag bs “fprarel” engure guna n yvfgrq “bowrpg.”
5. Jurer qvq gur fjbeq tvir lbh gur “craavrf sebz urnira” uvag?
6. Tb gb gur Neoberghz naq ybbx ng gur ersyrpgvat cbby.
7. “Lbh pna’g frr gur obggbz orpnhfr bs gur tyner bs gur oevtug yvtugf!”
8. Guvf zrffntr crefvfgf rira nsgre vg orpbzrf qnex, orpnhfr gura gur “uhtr sybbqyvtugf” ghea ba.
9. Ohg gubfr nera’g tbvat gb ynfg sberire rvgure, ner gurl?
10. Gur fjbeq fnvq craavrf neevir sebz urnira jura vg envaf.
11. Glcvpnyyl, vg envaf qhevat guhaqrefgbezf.
12. Jnvg sbe gur cbjre gb tb bhg, gura tb gb (be orggre lrg, nyernql or ng) gur Neoberghz. Yvtug gur synfuyvtug, gura “ybbx cbby.”
13. Abj (jvgu obbgf rdhvccrq) whfg oevat vg gb gur shfr obk naq vafreg vg. Fubhyq or fvzcyr, evtug?
14. Vs guvf ynfg fgrc qbrfa’g frrz fb fvzcyr nsgre nyy, cebprrq gb gur arkg dhrfgvba.
V qba’g unir rabhtu gvzr gb oevat gur craal gb gur shfr obk!
1. Lrf, gung fvk-ghea yvzvg ba gur synfuyvtug vf whfg oneryl *abg* rabhtu.
2. Gurer’f ab frperg cnffntr be bgure fubegre cngu orgjrra gur Neoberghz naq gur Znvagranapr Ebbz. Abe vf guvf n Qrngu Fuvc fvghngvba jurer lbh pna zrrg gur gjb guvatf va gur zvqqyr.
3. Lbh arrq zber gvzr ba gur synfuyvtug.
4. Lbh’er abg tbvat gb svaq onggrevrf naljurer. Guvf chmmyr ehaf ba Jbaqreynaq ybtvp.
5. Gur fjbeq qbrfa’g tvir n uvag sbe guvf bar, ohg fbzrbar ryfr pna.
6. Jub va gur tnzr vf bofrffrq jvgu gvzr?
7. Ubj unir lbh gevrq vagrenpgvat jvgu gur Juvgr Enoovg?
8. “Ybbxvat” ng uvz tvirf bar pyhr (gung lbh’ir nyernql frra), ohg lbh pna trg n zber rkcyvpvg pyhr ol qbvat fbzrguvat ryfr.
9. Jung qbrf ur fnl jura lbh svefg zrrg uvz?
10. Unir lbh gevrq erfcbaqvat? (GNYX qbrfa’g jbex, ohg FNL qbrf.)
11. Unir lbh gevrq erfcbaqvat cbyvgryl?
12. Jura lbh zrrg gur Juvgr Enoovg, “fnl fbeel” (“ncbybtvmr” nyfb jbexf).
13. Gur Qbezbhfr, ru? Jung qvq ur fnl ntnva jura lbh vagebqhprq uvz gb gur pybpx?
14. Chggvat gur Qbezbhfr va gur pybpx tvirf lbh “biregvzr”…
15. …zrnavat gung gur synfuyvtug’f fvk-ghea gvzre orpbzrf n svsgrra-ghea gvzre. Zber guna rabhtu gvzr gb svk gur cbjre bhgntr.
16. (Lrf, lbh fbyirq guvf chmmyr vanqiregragyl jvgubhg xabjvat vgf rssrpg.)
…wow, three parts with many steps makes me think this is a pretty tough puzzle.
I’m going to do one last push without hints, but I’m guessing I’m going to need these.
Had to reveal a few — knowing it was a penny was enough. I like how you customized that, heh.
I had already been suspicious of the clock thing but the logistics of the flashlight and staring at my map made it click into place.
On remaining puzzles, not relating to the power outage:
How do I deal with the Queen?
1. Lbh unir nyy gur vgrzf naq pyhrf lbh arrq.
2. Lbh qb arrq gb nffrzoyr gur synzvatb naq trg gur urqtrubt svefg, rira vs lbh’er abg npghnyyl tbvat gb cynl gur Dhrra’f tnzr.
3. Guvf bar fbyhgvba V’z abg tbvat gb fcbvy. Lbh qrfreir gur fngvfsnpgvba bs svthevat bhg gur svany fgrc lbhefrys.
What do I do with the oysters?
1. V xabj lbh’ir orra pbaqvgvbarq gb rkcrpg tbbsl tvnag blfgref erdhvevat rdhnyyl tbbsl fbyhgvbaf, ohg fbzrgvzrf na blfgre vf whfg na blfgre.
2. Jung ner fbzr ybtvpny guvatf gb qb jvgu blfgref?
3. “Bcra blfgref” naq rawbl lbhe crneyf.
4. Guvf fcnpr vagragvbanyyl yrsg oynax.
5. Guvf fcnpr rira zber vagragvbanyyl yrsg oynax.
How do I get the rattle from the Tweedle twins?
1. Gurl jba’g tvir vg hc jvyyvatyl. Lbh arrq gb znxr gurz nonaqba vg.
2. YBBXvat ng gur gjvaf cebivqrf n fhogyr uvag.
3. “Lbh pna’g fpner zr,” uhu? Creuncf gurer vf fbzr jnl lbh PNA fpner gurz?
4. Unir lbh frra nalguvat va gur cnynpr gung vf cnegvphyneyl fpnel?
5. Unir lbh frra nalguvat gung, jura lbh YBBX ng vg, gur tnzr fcrpvsvpnyyl pnyyf “cerggl fpnel?”
6. Erfgnegvat gur tnzr naq ehaavat guebhtu ntnva sebz gur ortvaavat vf gur orfg jnl gb svaq guvf.
7. Gur Wnoorejbpxl vf “cerggl fpnel.” Creuncf vs lbh fbzrubj oebhtug vg naq gur gjvaf gbtrgure, vg jbhyq fpner gurz bss.
8. Gheaf bhg ivbyrapr VFA’G gur nafjre gb guvf bar, nsgre nyy.
9. Vs lbh xvyy gur Wnoorejbpxl jvgu gur fjbeq, lbh’ir nyernql ybfg gur tnzr.
10. Lbh arrq n aba-ivbyrag zrnaf bs qrnyvat jvgu gur Wnoorejbpxl…
11. …obgu gb trg gur obbgf (gb fheivir gur cbjre bhgntr), ohg nyfb fb gung lbh pna hfr vg ntnvafg gur gjvaf.
12. Jung vgrzf unira’g lbh hfrq?
13. Bar bs gur fjbeq’f pyhrf vf vzcbegnag urer.
14. “Pngpun ornfgvr jvgu n frvar, jbira fgenaqf gung svg gur oenva…”
15. Znxr gur cvax unvearg, oevat vg gb gur Wnoorejbpxl, naq “pngpu Wnoorejbpxl.”
16. Gura oevat vg gb gur gjvaf naq eryrnfr vg.
17. (“Qebc arg” jbexf. Qba’g qb vg naljurer ryfr hayrff lbh jnag gb trg rngra!)
18. Frrzf gung enggyr jnf n gernfher nyy nybat! Rawbl gur fprcger.
I think I’m still missing at least one treasure.
1. Qba’g cebprrq hagvy lbh unir sbhaq 7 gernfherf (vapyhqvat gur pebja, gur crneyf, naq gur fprcger).
2. Lrf, gurer’f 8 gbgny. Gurer ner gjb (fhogyr) uvagf gb ubj gb svaq gur 8gu gernfher.
3. Lbh’ir frra bar uvag nyernql, sebz gur fjbeq.
4. Lbh’ir nyfb frra gur bgure uvag nyernql, sebz gur Juvgr Enoovg.
5. Jung vf gur zbfg vzcbegnag pbybe va guvf tnzr?
6. Gur zrffntr vaibxvat gur Cvax Cnagure vf, vaqrrq, n uvag. (Gur Juvgr Enoovg zragvbaf “Crgre’f Pryyne,” v.r., Crgre Fryyref.)
7. Sbyybj gur fjbeq’f vafgehpgvbaf rknpgyl, va gur ybpngvba uvagrq ng ol gur pyhr.
8. “V fnl, Vafcrpgbe Pybhfrnh!” jurer “gur Punoyvf unf tbar onq.”
9. Tb gb gur Jvar Pryyne naq “fnl vafcrpgbe” (be “fnl pybhfrnh”). Rawbl gur qvnzbaq.
10. …Ohg lbh’er fgvyy zvffvat gra cbvagf. Frr gur arkg (ynfg) dhrfgvba sbe gubfr.
V’ir fgberq rvtug gernfherf. Abj jung?
1. Sbyybj gur abvfr, creuncf?
2. Jul abg fubj gur crbcyr jung gurl jnag?
3. Gur crnfnagf’ pubvpr bs ubzbcubar vf n pyhr.
4. Juvpu bs lbhe tngurerq gernfherf frrz cnegvphyneyl ertny?
5. Jrne gur pebja naq ebor, pneel gur fprcger, naq tb hc gb gur gheerg.
6. “Gurer’f tbggn or zber,” ru? Ner gurer nal uvagf lbh unira’g hfrq lrg?
7. Fhpu nf, sebz gur fjbeq?
8. Fhpu nf, gung gur fjbeq tnir ng guvf ybpngvba?
9. Jung qvq gur fprcger nccrne gb or orsber lbh npdhverq vg?
10. “Funxr fprcger”
11. Abj urnq ba qbja gb zrrg lbhe nqbevat choyvp.
12. Bu, lbhe fpber qebccrq gb n uhaqerq fvkgl cbvagf? Jung qvq lbh qb gung pnhfrq gung?
13. Fgber lbhe gernfherf ntnva, naq *gura* tb zrrg lbhe nqbevat choyvp.
14. Gur Dhrra vf qrnq, ybat yvir gur Dhrra!
Without reading the clues, I wonder if you can put the hairnet over the wicket to keep the hedgehog from going through? Pinkness suggests a relation to the mingo perhaps.
I’ve tried this before but haven’t had any luck in the parser recognizing a command of that sort (but USE HAIRLOOM took a while to figure out so I can’t rule it out).
woooow I managed to get rid of the queen
(still haven’t broke open the rot13 yet but it is taunting me)
…MOOD TLOVER, WIDER THAN A MILE…
read it backwards
Dammit! I’m the person who always reads things backwards and I didn’t do it this time! Nice job.
FInished, probably doing the writeup tonight.