The game freeze after you won the final battle. If you want to get the hard badge, just refresh the page and win another (different) battle! The game will still say that you need to fight the last combat, but at least you'll get the badge :). Please leave this comment alive!
lot of tries... and now 206k. the key was taking a single ruby with a x16 (x8+pilot mode) modifier and another one with x12 (x6 + pilot mode) modifier. great, funny game.
Yes :) Someone shared his method in the comment section before.