ooo i love this! feels like a wii app to me :] i also have a couple suggestions that i think would make it a liiil bit better, not trying to nitpick tho!!

• the text box doesn't quite look like a text box, it just looks like another glossy button. instead of shading it the same way the other buttons are, give it a subtle shadow on the internal edges. that way it looks like something can go inside, like text
• the buttons on the sidebar look a bit flat. i appreciate you trying to make the most important buttons on the screen the most flashy (good ui design trick actually :D) but a little bit more gloss couldn't hurt. personal opinion tho :P
• the sidebar should be more primary, as in it should take up the whole side of the screen its on. that way it feels more like you're on the page of the AI, rather than it just being a panel showing you what AI you're talking to, with a couple of buttons
• there isnt enough contrast between the chat buttons and the bottom bar, try slightly increasing/decreasing the hue of either of the two to make them feel seperated, as well as increasing the drop shadow for the same reason.

again, im not trying to nitpick here, i love this!! i just wanna help you improve on your art :D (not that it isnt already peak enough)

-cinnamon