Absoloutely. Folk love surprises, and physical goals. Maybe the artifacts could burden the player with more than just weight, though? Perhaps each could change something fundamental about how the game works? Causing regeneration of soil, or attracting enemies to its location, endlessly pouring out water (does this game do water?). You know, something which forces a shift in play style whilst held - and is simple to implement. Could be fun! The best treasures are always booby trapped - what could be more glorious than a treasure which IS the trap?
Also, gonna second Eigenbom: get your game working before you overhaul the presentation. It worked for
Puzzlejuice. Slick art won't make a dull game great - though it will make a solid game shine.
Also, apparently my browser doesn't have the plugin required to play your game? That's a shame, wanted to see where it's at these days. What's this built in?
Keep it up, Ashkin!

Ooooh, I really like the idea of the artifact changing everything. Maybe just do the classic thing where the whole cave system begins to crumble, blocks falling around you as you try to make your way out. I want the player to get OUT after getting the artifact, rather than loitering around. And no, water is not a thing that this game can do. :c
I guess you're right about presentation. Like I usually do with graphics, though, I'll probably work on programming and graphics parallel to each other so that when I get burnt out on one I can switch to the other.
Someone else actually had that plugin problem the other day. I'm not sure what causes it- the whole thing just uses Flixel and I'm sure I haven't added on anything special. Weird.
OMG! I played your game and i have delighted with it!! Awesome! AWESOME!!!
Thank you very much, Winged- your style is inspiring to me.