"use the arrow keys to move"
No, really, I just don't know of any serious tips or strategies for this game.
In fact I was surprised when reading through this thread that tricks like these even existed.
But I think that you should throw in a few joke tips.
Just a few, so they don't outweigh the serious ones.
OH NO DON'T MAKE THIS LIKE BIONICLE HEROES.
No seriously, the first tip you buy is 'Press X to fire' (that is, on the PlayStation version). But to get the money to buy it you need to have blown up the local scenery... by pressing X.
My tips: I prefer to go through the shortcut on Magma Moon Marathon that is blocked by a shielding first. This gives you a flying boost and a chance to hear what the code is for the three-white shortcut.
Got an oil slick and there's a racer next to you? Drive into their side and drop it.
To annoy Kahuka, drop magnetic traps right in front of blue bricks.
ALL racers can be beaten (except Rocket Racer and Miss Voltage) by using no green bricks except for the beginning turbo. I have done this. It's not easy, but you can still come first.
If you're raging really badly at a racer, grappling hook them, pick up a red, shoot them, pick up a yellow, and drop it in their path.
That's what you get, Captain Redbeard.
Make sure you know which way the track goes in Royal Knights Raceway. Turning the wrong way will make you fail.
If you're trapped by a Mummy's Curse, get a blue brick and use it. OR drive into a racer. Either way, you don't have it anymore.
Avoid warping on the split track in Rocket Racer Run. Occasionally you will warp round in a circle.
Sometimes flying can be better than warping as you can pick up bricks while flying.
To beat Redbeard easily, shoot him just before he picks up a red. His speed will carry him over the red brick, which you can now pick up to do the same thing again.
Dynamite is ineffective. Find another white and make it into a Magnetic Trap.
I have found rockets to be effective, but a warp will take you far further.
Drop any yellow in the twisty turny bit in Knightmare-Athon. A Mummy's Curse is particularly effective as it will get everyone.
Then switch the blue bricks with something else so they can't get out.
Wow, that was long.