For the Hard badge you will need max wheels and rocket, and the handstand trick. Here's the guide;
1. Hit the UP button on the first orange pole to get full speed
2. Hit the UP button on the second orange pole to get full lift
3. As soon as you take off, hold down on the LEFT key and keep spamming UP UP DOWN
4. Every time you spam UP UP DOWN, you acquire 200 points
5. Every time you backflip, you acquire 300 points