What's wrong with photos looking like they were made with a Holga? People pay enormous amounts for smartphones with very good cameras built in and then go out of their way to make photos that look like they were made with a Holga.
Maybe people do, but Holga doesn't cost 200 Euro. I wish they'd built a proper camera, not a toy. It's a pity.because it looks so good.
Somebody earlier said, they might fit a better lens to it, good idea.