This looks like a map. But ketsuno is right, imported material is looked down upon with spells. ESPECIALLY when it isn't even part of the spell. I don't really know about terrain though. Spell maps should provide an adequate testing grounds so all the spells abilities can be seen in effect on units. I'd say that this map is fine for that.
I booted up the map and here's what I got. All the spells work fine, when they aren't used at the same time. Dropping the waits would make almost all of these if not all of them MUI. Shuriken fires way too fast, it just disappears really really fast. I have a hard to using the other shuriken related abilities, especially when the cooldown is hella long on the demo map. Your loop for the shuriken is just awkward. You might want to seek some help on making it better.
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((Ability being cast) Equal to Detonate Shuriken ) and ((Casting unit) Equal to Unit[11])
That lines is going to fuck you over as soon as someone else casts shuriken. Only the second caster will be able to activate detonate shuriken.
I really liked iron raven and twin rising dragons. Iron raven is basically omnislash, you described it as it yourself, but it looks cool. Twin rising dragons is just an area of effect spell, but again it looks cool when your guy does it. Btw after the spell is cast, the caster just keeps spinning along the ground until issued another order.
These spells have some promise, and the addition of a mini-game is nice, but I would reject these. Too many bugs, and the waits make it not MUI