Missles can be used when you are behind a player, you press the button and the missle follows him. Bombs, they are like missles but just shoot straight forward. Potion Glasses, there are two different types of potions. One is red and the other is green. The green potion, just slows you down when you run it over.
Time trial is just like it sounds.
You do a race and try to get the best time. You race around a track collecting the question mark boxes and trying to hit the other players. This mode is where you can play with at least two players up to four players. You can race each other on a single track or in a cup consisting of four tracks. You can play this in-Easy, Medium, and Hard versions.