I dunno if anyone here's ever played MarioKart, but it's ftw. You can pick up weapons, by driving through the object boxes. R might be able to code pickups that give you random bonuses, but rather than a picture, it should just say in text which bonus you have.
Here are some bonuses from MarioKart I think we could use:
Boost mushrooms: Sometimes, the weapon box gives you boost mushrooms. This lets you use one big boost of speed. On AX, when the bonus is picked up, it should let you use speedboost temporarily.
Homing turtles: When picked up, these let you fire a turtle shell at the person infront of you. When it hits them, it disrupts their car. On AX, when this bonus is used, it could send the turtle object flying at the person in front of you, and when it hits, they should automatically get /flung.
Fake object box: This lets you put an object box on the road, however it will be solid and will make you crash if you go into it. This could work on aX by making you get auto-flung when you drive into it.
Winner turtle: This sends a turtle flying to the person in the lead when used. The turtle disrupts the car when it hits. This could work like the homing turtle, except hitting the leader, not the person in front of you.
Watch this to get a better idea, pay attention to the bonus weapons:
[youtube]http://www.youtube.com/watch?v=o6iErGb_EX0[/youtube]