The greenish color between frames is due to light leaking under the edge of the film gate during exposure -- you can see some of the regular orange base of unexposed, developed C-41 film along the edges in spots. The color cast in the exposed frames is probably at least partly due to the color of the light (golden hour?), since it varies from frame to frame. A more exposed frame will tend to show stronger dye formation, also, so the bluer frame here is probably more exposed.
Exposure can be iffy with pinhole cameras (light can change while the shutter is open), and reciprocity departure of Lomography films isn't likely to be well documented -- so you have some frames that are overexposed, and some that are less exposed. You'll be able to make more sense of this once you can scan or print the negatives.
On the face of it, however, I don't think this is a development problem or a film problem; it's mostly variation in exposure.