These are fairly normal amongst other Holga photos. Many uses cross processing techniques that I'll some other time to get high contrast and wild colors. Here you can see the odd focusing an vignetting causes by the plastic lens. I can't remember the last time I used a non-disposable film camera. I'm so entrenched in our digital world that this was inredibly refreshing for me. It takes a lot more effort but the results are so interesting that it is totally worth it.
If you liked these photos you can learn more about lomography at the official lomography website.