hold A and D until you get to the top of your screen
after that just hold A or D and start spinning
you will spin a total of 4 times before you die, getting a total of 208-212 points

When you have 15k coins, scrow to the right and find the ship Called HONEYWELL BUMBLER
After that you do the same as with the first ship
Just go to the top of the screen and start flipping
you will flip 6 times and get a total 430-434 coins per life

you can just play miltiplayer and get 100-300 coins a game