Hey Nola,
Nice to hear another one of yours. I really dig this. You definitely have "a sound" with your stuff, but you manage to do that without really repeating yourself too much (IMO), which isn't always easy to do.
I really dig the major seven IV chord; it works really well in this song. I also love the guitar tones throughout. I really do dig the feedback, too, but IMHO it begins to lose its effectiveness because it's appearing too frequently.
I would say it could definitely use lyrics. The humming is nice, but the song gets a little monotonous with it, whereas lyrics will help to keep things fresh by overlaying different images atop the music. If the song were to be just humming, I think you could shorten it up a bit.
I like the idea of the bass coming in later. Sparse stuff would probably be all it needs.
Take all of this with a grain of salt; it's all just my opinion.
I really like your picture too, and I'm glad someone brought that up. It reminds me of my childhood too.
Take Five is an incredible album. I have it on vinyl and listen to it often. He's one of my favorites.
Thanks for sharing! I can't wait to hear the final product.