Thanks for the feedback and I'm really glad you enjoyed the game.
I have had an update in development for a while now that comes out with more levels and more enemies. I am also trying to find a better way of loading levels so that I can easily include community created content. Unfortunately I have been incredibly busy with schoolwork, but the update should be coming out in the next couple weeks when I find some time to polish it off.
With regards to means of communicating with me, you can drop me an email at jwiggs.dev@gmail.com.
Thanks for your interest!