Great shot. Great mood. Great colors. Don't change a thing. The mood you've created is perfect for the period. A great example of when to deviate from neutral and boring.
Love the colors ,accentuates the vintage look, color and contrast remind me of some prints I have in an old album from the 60's. I wouldn't change a thing.
This is also the perfect type of image for a "cheapo" camera. That only adds to the mood and probably gets you much closer to the cool vintage look faster and more effectively than if you had used really high end gear. There's a reason a lot of us still shoot film and often use Holgas and Dianas rather than an IQ180.
I understand the color treatment may not be for all. I was not going for technically correct skins tones. I was going for retro as some had noticed. This effect was added in post and not out of the camera.