Will there be the ability to push, pull, pick up/throw objects? Or other such puzzle elements like hitting buttons with a projectile to open a switch?

Hi hi. You can already do that using the plugin. Please visit the manual and read all the commands. You can create your own feature using them. If you want anything else don't hesitate to ask.

Update: To make it easier I'm writing a tutorial for that feature. Don't forget to check the manual page frequently to see new tutorials. :D