So has anyone heard of this Korean fangame? It's pretty decent (and actually finished). It's got far more maps than most fangames, up to 400. There's about 27 effects, and most of them are required for something.
There's one effect in particular that is extremely useful for backtracking, especially when you get stuck in a dead end. I won't go into details so that you might enjoy it yourself.
The music and graphics are pretty hit or miss, though. Some areas have pretty nice tracks, others can get annoying after a while, but not nearly to the same level as Farewell's music.
It's been translated to English, too, so that's helpful for picking out effects.
>Download (English patch)http://www.mediafire.com/file/6gm4xxyhbq55eus/DID+ver.1.4.2+English+version+%27Revision+A%27.rar