This game is way easier than it looks, at the end, just untangle all the nodes, and then try to make straight lines with them lighting the most nodes you can. if you do this right, you should have 1 or 2 nodes frees at the end to use in case you missed lighting one node :)
screw the badge this game is so desperately annoying! i hate it when im about to kill someone and a item gets in the way and screws me over. there should be a button to select items, instead of just walking over them