I cannot wait for the real thing to come out.
So, ya, like people have already said, it would be great to have some variation and option. Maybe like a "Choose your species" thing at the beginning (or just the characters from the star fox team? I don't know, maybe having the actual characters sets people's expectations for how powerful they should be and that might cause some displeasure? maybe, I don't know, and I don't mind either way, because these types of games are great). Each species/character would have its own stats, if you want to make it that complicated (it would be the good type of complicated; people would enjoy the game more). Maybe a "choose your outfit" thing also, but they'd have to be pretty lame as stats go =p And, if you go with a previous weapon suggestion, you could maybe have a few crumby start-out weapons that you could easily drop if you found a better one (for example, you could start out with a butter knife then you could drop it for a whip (which would be awesome).
If I understand what futa (male belongings on females?) is, you should make that an option. Maybe.. I don't know. Wouldn't be the end of the world, but it wouldn't make the game any more enjoyable for me ;)
I like the idea of having a variety of enemies.. Maybe they could have different types of armor also? Basically because, it doesn't make it a whole lot harder if there are more of them (you can easily spam that kick thing if too many of them get bunched together). As bosses go (assuming you put in bosses, and assuming you're making this a huge project (it is okay if you aren't), maybe Star Wolf's team?
Don't feel pressured or anything, man. You do a great job and I love this stuff no matter what.