Being honest the 3rd level is the hardest I made, after I building it in Unity I had to reconstruct the solution for myself ^^
Ive gon ahead and uploadet solution 3 and 5 to a dropbox if you want you can check them out !
https://www.dropbox.com/sh/ggtfz96aiobr393/AAD7uDqRWC2SaZFwppuV6h_Ta?dl=0