I just released version 1.2 of my simple contact form last night (early this morning?).  The update adds an argument to the shortcode allowing you to specify the recipient email address. You add the shortcode like normal, except before the last bracket ] you add

to_email="youremail@example.com"

You don’t have to define a recipient, though.  If you leave the argument out (or if you make a typo and the address isn’t a valid email) the script will default to your blog’s admin email.

Some time this weekend, I’ll probably add an option to send a copy of the email to the blog’s admin.

~UPDATE~

There was a small bug in the release.  The bot check image was not being rendered due to an incomplete filepath.  That’s been fixed in 1.2.1, now released.