A couple of things:
If you're going to make something "interactive", meaning you can click on it, take time to make sure it's interesting. Things like Maggie's hamper door opening or a light turning on are a good idea b/c it makes you click everywhere, but it really doesn't add much to the work overall. That's really just a nit-picky thing though.
Make the arrows throughout the house clickable, instead of the space next to the arrows. That's kind of confusing. People naturally want to click on the arrows to move since they're there.
The To-Do list is a good idea, why not take it a little further and make it a required checklist? Make the whole thing into a scavenger hunt game, where the user has to find all the items or click all the items to get the special extras. That might be cool, just a thought.
Despite my criticisms, I thought this was done very well and it's pretty clear you put a lot of work into this. I liked it and I'm looking forward to the Powe Plant version!