I've made a test with my self modified crappy plastic camera:
Some sharpness in center and many distortion outside:
Heavy flare with sun shining direkt to the lens:
A city scene:
The camera i've used is marked as 'Wide Pic Panoramic Lens'. I think the focal length is ~28mm.
I have removed the internal mask for the wide-panorama-format and increased the aperture.
The film was a long time expired 'Porst colorX' 200-36.