Oh, I mean that the particular boss battle in that video is impossible due to a glitch --he keeps spamming tons and tons of attacks without rest. I only beat him using a well-known secret.
The original Iji executable works fine in WINE, but the fact that it only can be compiled in GM5 is limiting. For example, if you wanted to mod the game, you would be forced to use GM5 (like the MSPA mod of Iji did). So my policy on Iji is sort of similar to the free
software concerns of Debian: if you have the source, but the tools to compile it aren't open, then you're no better off than if it were closed.
Otherwise, the look and feel of Iji is now
exactly the same in ENIGMA, barring the occasional bug. This is a testament to the ENIGMA engine as a whole.