My unity project won't load my level for editing on a different PC

I started my Unity project at college, I brought all the files home on a memory stick but when I try to open the project at home to carry on working none of the game level comes up its just the blank grey canvas you start with, I think the textures and objects are there they just aren't loading into the game level I made at college, could it be that my home PC has a newer version of unity?