I tried for hours to play co-op but I can’t

Hello everybody, I don't know if this is going to work but I made a petition to see if there's a chance of this game being updated and adding the missing content present in the Xbox 360 and PlayStation 3 versions If anyone wants to sign it here's the link: https://www.change.org/p/add-the-missing-features-for-the-pc-version-of-toy-story-3...

so i had this game on my 360 as a kid but it just doesn't hit as hard we need the wells all the different stuff in alls toy barn and all the levels arent like the memory the zurg level was longer in the 360 version and some things are missing i wish you could chose where to place buildings and different cloting items some places are also missing like bo peeps place as well as the place that connects slinkys place and the town also when you walk into the haunted house and such places it wouldnt load like it...

I grew up playing the game on Xbox and I had a ton of fun with toy box mode, I've seen that this version has some missing content, is there a mod out there that restores at least some of it. And if there isn't a mod like that is the missing content a huge deal? does it affect the experience a lot or is it just a few missions that aren't super important?...

I don't understand beacouse this is not saving, everytime when i start the game, i do something progress, then i go to the save and this doesn't working, HELPPPPPP