String Processing Example: Riddle Minigame

#include "std.zh"
hero script kb_riddle
{
    const int SFX_WON = 20;
    const int SFX_LOSS = 28;
    const int BUFFER_SIZE = 20;
    void run()
    {

        int StringBuffer[BUFFER_SIZE];
        int lower[BUFFER_SIZE];
        TraceS("Riddle Game String Processor:\n");
        Game->TypingMode = true;
        int index; int won;

        while(1)
        {
            while(!Input->Key[KEY_ENTER])
            {
                for(int i = KEY_A; i<=KEY_SPACE; ++i)
                {

                    if(Input->ReadKey[i])
                    {
                        if(i == KEY_BACKSPACE && index > 0)
                        {
                            --index;
                            StringBuffer[index] = 0;
                        }
                        else
                        {
                            if ( index < ( BUFFER_SIZE-1 ) )
                            {
                                LogPrint("KeyToChar is: %d \n", KeyToChar(i));
                                StringBuffer[index] = KeyToChar(i);
                                ++index;
                            }
                        }

                        TraceS(StringBuffer);
                    }
                }
                Screen->DrawString(6, 8, 20, 2, 1, -1, 0, "I am a word that indicates cardinal directions.", 128);
                Screen->DrawString(6, 8, 40, 2, 1, -1, 0, "Type, then press ENTER to guess...", 128);
                Screen->DrawString(6, 20, 60, 0, 1, -1, 0, StringBuffer, 128);
                Waitframe();
            }
            Screen->DrawString(6, 8, 20, 2, 1, -1, 0, "I am a word that indicates cardinal directions.", 128);
            Screen->DrawString(6, 8, 40, 2, 1, -1, 0, "Type, then press ENTER to guess...", 128);
            Screen->DrawString(6, 20, 60, 0, 1, -1, 0, StringBuffer, 128);


            strcpy(lower, StringBuffer);
            TraceNL(); TraceS(StringBuffer); TraceNL();
            TraceS(lower); TraceNL();
            //convert to lowercase as a precaution
            utol(lower);
            TraceS(lower); TraceNL();
            //process
            if ( !(strcmp(lower, "news")) || !(strcmp(lower, "sewn")) )
            {
                won = 1;
            }
            else won = 2;
            if ( won == 1 )
            {
                Game->TypingMode = false;
                Game->PlaySound(SFX_WON);
                while(!Input->ReadKey[KEY_Q])
                {
                    Screen->DrawString(6, 8, 20, 0, 1, -1, 0, "You win! Press Q to exit.", 128);
                    ++Game->NumDeaths;
                    Waitframe();
                }
                Game->End();
            }
            else if ( won == 2 )
            {
                won = 0;

                Game->PlaySound(SFX_LOSS);

                while(!Input->ReadKey[KEY_Y])
                {
                    Screen->DrawString(6, 8, 20, 0, 1, -1, 0, "Fail. Press Y to try again.", 128);
                    Waitframe();
                }

                for ( int q = 0; q < 20; ++q ) StringBuffer[q] = 0;
                index = 0;
            }
            Waitframe();
        }
        Game->TypingMode = false;
    }
}