I was surprised when I saw that Legend of the Omni-Sphere needed a
review, considering it was released back in late 2009. Games usually
don't sit on the "need review" rack for too awful long. After playing
the short, 15-minute demo I can see why people may have decided not to
review it for so long.
The graphics look pretty solid overall, and the animations are well
done. Amongst the goodness though, two things still stuck out at me.
There is not near enough variety in enemy battle sprites. Most of them
are just palette swapped copies that get pretty boring fast. Another
thing I noticed, and forgive me if I'm wrong, but I could not help but
think I've seen some of the graphics before in a different game.
Perhaps some are ripped, but maybe not; regardless of who did them they
look good to me. The graphics are by far Omni-sphere's strong point, so
be prepared because everything goes sharply downhill from here.

The plot is not very engaging besides the short opening sequence.
Townspeople don't have anything important to say. Some take a stab at
some light jokes, but it doesn't work out too well. The plot on paper
seems serious yet it's not handled that way in the dialogue. The
characters are not fleshed out at all, and the author may argue this is
due to the game being 15 minutes long. In my opinion, if you don't give
your audience something about the character to care about early on, why
should they care an hour, two hours down the road? The idea is to grab
the player's attention at the beginning so they want to play more, and
Omni-sphere does not do that at all. In fact, after hearing the music
alone you may want to spontaneously combust.

When it comes to OHRRPGCE games I've always been one to think that
using too many popular tunes from any game (especially the Final
Fantasy series) can take away from your game as a whole. Every track
but ONE in Omni-sphere is from a Final Fantasy game (the world map
music is from Breath of Fire 3), and I'm sorry but that is extremely
distracting to me. The intro sequence with the armies fighting each
other is kind of cool, but I had a hard time taking it seriously due to
FF4's Red Wings tune being played in the background. If I wanted to
hear a Final Fantasy soundtrack, I'd play one of their games; not an
OHRRPGCE game that is trying way too hard to be a copy it.
Speaking of copying, there was another thing that turned me off pretty
early into the game. Chris, the main hero, falls into a hole at the
very beginning of the game and discovers the Omni-sphere cave, very
much in the fashion of Final Fantasy 3 DS and the Wind Cave (even down
to the same music!). Having something so similar to a popular
commercial game right at the beginning is not likely to make people
want to play it (unless it is a remake of course, but that's not the
case here).
What Omni-sphere needs is a heavy dose of originality and definitely a
new soundtrack. It's okay to be cliche, heck, pretty much any JRPG
nowadays is a copy of something that has been done before. Again, the
difference is how you go about delivering it that is the key to
success. I think Earthbound is a good example of a story that is
unoriginal but is delivered in a way that is extremely satisfying.
That's not to say that you should make a modern RPG, but you understand
the point I'm trying to make by now.
Rearrange the soundtrack and throw in some of your own ideas and events
into the story and I guarantee that both you and your player base will
appreciate the game much more. Otherwise, Omni-sphere seems like a
cheap knock-off of a Final Fantasy game that is in dire need of some
creativity.