Glad you enjoyed it overall!
Yeah, the lack of variety in enemies/combat is definitely an issue, and it was improved SOMEWHAT in GutterTrash. I'm a little limited in what I can do in that area though, because more enemies, if they're significantly different, doesn't just mean new sprites, but also new variations for the sex sprites etc. It adds up quickly. I do a similar thing in GT (one species of enemies, but a few palate swaps for sub-classes), but there's a bit more depth to it, especially on some of the bosses. Glad you were able to enjoy this first attempt though!