Easy way to beat Rangor, use the Y axis. Stay above or below him, spam weak attacks until he moves up and gets hit, then finish the combo with a strong attack to knock him back. Repeat until he's dead.
A masterpiece of flash design, I can never play another game, as this has completely ruined me for everything else. I can finally die happy knowing that it will never get better than this.
Easy mode: Go with pure physical skills (i.e. defense, offense, agility, and speed.) Get to level 8, do the first level a few times with blind mode on. Get to level 11, do the first level a few times with Sudden Death AND blind mode on. At 15, sudden death, blind, no magic. Whenever you max all your physical skills, do the rest of the game. No one else will have a chance.
Getting all the survival badges is pretty easy- Equip the shield, big laser cannon, repair droid, decently fast legs, and the heaviest cockpit you can. Use the shield often, kill stuff, try not to get hit when shield isn't up (I ran circles around the tanks.). You should make it to wave 30 with ease, getting you the six medals for survival, +1 for killing 500 guys.
When you say, right in the description, that the Cyclomaniacs have put away their bike, you can't follow up by expecting us NOT to compare it to Cyclomaniacs. That said, mediocre.