The hard badge isn't that hard, after a few tries you can easily get it if you remember the song so you know when all the consecutive jumps come. Try to do all different tricks as soon as possible to get 10x multiplier and then aim for a pilot view so you'll reach 20x. Once you're at 10x or 20x stop doing tricks and focus on picking up the gems and keep hitting the ramps, after the first set of jumps you should be around 250k and then at the second set you'll get the hard medal. + if this helps. :)
Weird gravity, but fun. Need more levels though.
Small glitch, when you throw the ball and you reset when it is in the net it says 'Well Done!!! Your Score: 0'