It is great! It works on my keyboard, and I think I can learn how to use it when I have time.

That is what bioshock did.

it is inspiring, ascii art of 3d game is valid, maybe we can convert some good old 3d games into ascii?

Already done, thanks to libcaca:

http://caca.zoy.org/ http://doom.wikia.com/wiki/Text_Mode_Doom

Don't forget TTYQuake:

http://webpages.mr.net/bobz/ttyquake/

(best quote: "If you have to ask why, you're not a member of the intended audience. Please go on about your business and accept my apologies for this distraction.")

and text mode UT configs by Icculus (or: switching the SDL renderer backend to aalib):

http://icculus.org/~chunky/ut/aaut/