Scratch

This sounds like a fun project and you have great questions.  When you want to have several actions like this, one way to learn how to program them is to find projects with similar actions.  You can download them and see what the scripts are like.  Searching for tutorials also works.  Check out these two with advice on shooting:

http://scratch.mit.edu/projects/Helping_You/306445
http://scratch.mit.edu/projects/Tutorial_Maker/190024

Here is a simple way to keep score. Can the "if touching" and variable be modified to fit your needs?

http://scratch.mit.edu/projects/room209/444813

<when I receive[ HAHAHA!
<point in direction( Mario
<show>
<repeat until><touching[ edge
<move(-10)steps>+
<hide>
<go to[ bowser

Ye, share it to your user file.  It would be fun to see how your project turned out. Does everyone in class have to make one?  What sort of choices did you get to make about the assignment?

Here are bowsers scripts:


<when green flag clicked>
<repeat until><( <{points  }> <>> 5 )>
<wait(<pick random( 2 )to(  5 )secsc>
<say[ HAHAHAHAH! ]for( 2 )secs>
<end>
<end>

Here are the fireballs scripts:

<when green flag clicked>
<repeat until><( <{points  }> <>> 5 )>
<show>
<point towards( mario
<repeat until><touching[ edge
<move( 5 )steps>
<end>
<end>
<hide>

here are mario's scripts

<when green flag clicked>
<repeat until><( <{points  }> <>> 5 )>
<if><touching[ bowser
<change{ points }by( 1
<wait until><<  <not>  >><touching[ bowser
<end>