Yes, Geoffrey is a name. And I don't think the source was ever made public, so a mod would be impossible unless you recreate it from scratch. (I think.)
As music and graphic it reminds NES.
The music is composed by Zepsi using an actual real NES with a midines cartridge, so the music is as close as it can be.
To be honest I don't really like GTF. The graphics and overall design are below what Nifflas is capable of now. (Though the music's okay.) The only reason anyone is playing the game now, years after it was made, is because of how good Nifflas's more recent stuff has been.
This game is exactly what Nifflas is capable of.
Quote from: The stickman on December 04, 2009, 04:02:24This game is exactly what Nifflas is capable of.Erm..
By the way: If you look (moderately) closely, you can find a download link for every released game in its respective description!