To do it without dice or whatever, you can make a projectile chooser thing. Like when you click the random box (and you have enough points) a stand thingy that is like 1by6 spawns a projectile from a random spot on the brick and hits other bricks that are 1by2 1by3 or even 1by4. The size of the brick determines the odds of getting the weapon (1by2 means you rarely get it, like a ray gun or Wunderwaffle) Then you can color code it like green is likely to get, yellow is sometimes you get it, and red is rarely you get it. I know this is probably hard to understand, but try. Also, someone else (if they know what I am talking about) could explain to him what I am talkking about.
