Currently you have very generic function names that are likely to conflict with functions from other plugins or themes.

Every function in your plugin should be prefixed with a prefix that is unique to your plugin.

For example, if your plugin is called "Easy Custom Post Types", then you might prefix your functions with ecpt_{your function name here}.

When you have updated your plugin code, respond to this email with the new code for us to review again.

Alternately, you can use this tool to generate one:
http://tools.trepmal.com/wp-readme-generator/

A readme.txt is needed so your plugin will display correctly in our repository, but also so we can make sure you're providing the users with all the information they need before they install your plugin. Our goal with this is to make sure everyone knows what they're installing and what they need to do before they install it. No surprises :)

This is especially important if your plugin is making calls back to your own servers. For the most part, we do not permit offloading of images or code, however in the case where you are providing a service (like Disqus or Akismet or Twitter), we permit it. The catch is you have to actually explain this to the layman in your readme, so they know where data is going.

Please send a link so the completed plugin can be downloaded. Alternately you can reply to this and send a .zip or .rar file. As this is for a new plugin request, please reply within seven days of this email or we will reject your plugin.

You're running this image generation from your server, which is fine, but you're not making sure people know that in the readme. You need to be clear that these images will be generated from your site -especially- since the image STAYS on your site!

Also you need to fix your submit button: http://cl.ly/image/2f0O1J3A0k3X