Button btn

Hi folks, I need to design a "button" btn for the Android app I'm working on... It's in the product branding.

You tab on this btn, it opens panel for user to create memory (location, audio, video, thought, photo). as seen here, popup from bottom, and goes back to bottom...

So, I come up with this btn design, what do you think? I'm terrible at designing such things! so, any feedback is much appreciated! Thanks,

ps, you are very welcome to follow me on Twitter for updates on this project :)