I like it

Now this is pretty awesome I like what you have done here I like that you have added an expression here it does seem to need more details though and more brightness like adding a 3rd layer of color would be really nice but those are just some simple ideas to really push this forward

~~THINGS TO IMPROVE ON~~
An extra layer of color would be plus and some more detail in the background

~X~

Feels like the (lack of) background detail clashes a bit with the character art. The clash of color works well, but I feel like the 'wave' could've been more visual, seems here like it's basically a blurred out line (I mean, spikes made with the blur tool), think the brush would let you make it a bit more radiant/effectual. Keep it up!

-cd-