@sergiocornaga: Glad to work with you. Your backgrounds turned out great! And it's good to see I'm not the only one who has the clapping girl music from Rhythm Tengoku permanently stuck in my head.
Thank you all for your feedback. I'm glad to see you're enjoying the writing, and that I didn't screw up the music too much with last minute cheap Yamaha keyboard action.

And, d'oh. I may have unintentionally made it too difficult with red herrings, since most of my beta testers solved the puzzles in a shell of the game without any of the conversations or background objects. (And reetva never got back to me

) Err... has anyone beat the game? Found a key? Solved a puzzle?
Going to be offline until tonight, so in the meantime, here are some hints. I guess if no one's solved it in a few days, I need to take a good long look at my life... and submit a walkthrough to indiefaqs.

General Hints:
Talk to everybody. You'll usually get an item for your trouble.
All items are used in puzzles. If it is in your inventory, it has a use.
Characters that you can talk to but don't give you items are directly involved in puzzles in some way.
Right click on everything that looks important to look at it. You might get a clue.
You probably won't have the items you need the first time you run into a puzzle.
You can double-click an arrow to fast travel.
You can get a save/load menu by pressing Escape. If you're stuck, try saving and coming back another time.
Specific Hints (semi-spoilers, mostly for where the puzzles are, in small text):
Rings:
You can talk to Speedy to get your rings back if you lost them.
Zombie:
I probably should have established that he's guarding the door in more than just the look dialogue. -.-;
Seamus:
She's looking for something. What equivalent does that something have in the Metroid series?
Peek:
Touching him just results in you getting shocked. How can you get around that?
Pitfall:
Requires a bit of spatial thinking and a bizarre combination of multiple game mechanics.
Elevator Action:
"I'm pretty sure I can't fix it" means this isn't a puzzle. Move along.