What do you mean the painting needs to be perfectly put man.. already solved it two times but it seems it needs to be perfect, that's tough in a phone
The painting should snap into place when you place the piece in the general vicinity. Make sure you're putting it over the greyscale version. And actually, I've added a skip button to it in the newest versions on Patreon, so you can decide to take no points and leave it. That will be part of the next free demo too.