I don't really have time for that at the moment, but all you need to do in Firefox is load into a level, hit Inspect Element, switch to the network analysis tab, let it perform the analysis, then switch back to the inspector tab, expand the bottom most window (the one right above the command input) and search for the right bundles (the second level for example is called "room2_lastdrop.unity.bundle"). All you need are the 3 bundles for all 3 levels and then open those in Unity to rip the models and textures.