6: Buy rocket #3 and remember to aim up, the higher you go, the more time for combos you have. If you are lucky you can hit the space shuttle for an extra combo and a bump up.
7: get the propellor beanie hat, the bat and any ground tricks if you like. Pole vault can be abused on the ground to rack up your score.
8: Do not buy the dumpster until you can afford both the rocket 4 and dumpster dive as well.
9: time to fight the worm: finish your jumps with dumpster dive to go underground to fight the worm. Just hit bombs back at it. Groupies can protect you here: Each time you get hit you lose one groupie.
10: buy the gold cart and the Hang glider, time to fight the monkey.
When gliding the monkey will appear. Avoid bombs and hit bananas back at him. Buy groupies for extra hp.
Don't use the hang glider while still in space: you will most likely crash!
1:Time your jumps: make sure to jumps in the middle of the meters (the yellow portion). Getting a perfect awards 1000 points which is useful early on.
2: Don't bother buying wheels, they just make it harder to get perfect jumps.
3: Buy the Superman first. There is a hidden extra move besides left, left, up: the front superman, right, right up. Doing jumps with front superman+superman awards 500 points per jump easily. Get a perfect with that and you score 4k a jump.
4: Buy rockets #1, then #2
5: Buy remaining air tricks and try to combo up as high as possible