110 REM === http://reddit.com/r/RetroBattlestations
120 REM === written by FozzTexx
130 REM === Kaypro 4/84 version by RottenSalad
200 REM === Clear screen and setup variables
210 PRINT CHR$(27)+"C4":PRINT CHR$(26)
220 CL=40:RW=24:REM Columns and Rows of screen
230 CA=45:CN=5:REM Angle and lenght of cannon
240 CX=5:PX=CL-5:SC=0:LV=3
250 PI=3.14159
300 REM === Play game
310 CV=INT(RND(1)*15)+10:GOSUB 4010:GOSUB 2010
320 GOSUB 2510
330 IF ASC(KE$)=11 THEN CA=CA+5:IF CA>85 THEN CA=85
340 IF ASC(KE$)=10 THEN CA=CA-5:IF CA<15 THEN CA=15
350 IF KE$="Q" OR KE$="q" OR KE$=CHR$(81) OR KE$=CHR$(113) THEN PRINT CHR$(27)+"B4":END
360 IF KE$=" " THEN 410
370 GOSUB 1010
380 GOTO 320
400 REM === Fire!
410 LX=(CN+1)*COS((360-CA)*PI/180):LY=(CN+1)*SIN((360-CA)*PI/180)
420 BX=CX+LX:BY=RW+LY
430 GOSUB 1510
440 VX=CV*COS((360-CA)*PI/180):VY=CV*SIN((360-CA)*PI/180)
500 REM === Move player and animate ball
510 GOSUB 2510
520 IF ASC(KE$)=8 THEN PX=PX-1:IF PX<CX+CN THEN PX=CX+CN
530 IF ASC(KE$)=12 THEN PX=PX+1:IF PX>CL-1 THEN PX=CL-1
540 GOSUB 2010
550 BX=BX+(VX/10):BY=BY+(VY/10):GOSUB 1510
560 VY=VY+2
570 IF BY<RW THEN 510
580 P$=" ":X1%=BX%:Y1%=BY%:GOSUB 3510
600 REM === Score or die
610 LX=BX-BX%:LY=BY-BY%:L2=RW-BY%
620 IX=BX%+LX*(L2/LY)
630 IF IX>=PX-1 AND IX<=PX+1 THEN SC=SC+10:PRINT CHR$(7):GOTO 310
640 LV=LV-1:GOSUB 4010
650 IF LV<1 THEN P$="GAME OVER":X1%=(CL-LEN(P$))/2:Y1%=RW/2:GOSUB 3510:PRINT CHR$(27)+"B4":END
660 GOTO 310
1000 REM === Draw cannon
1010 IF (CA=LA) THEN RETURN
1020 P$="ANGLE: "+STR$(CA)+" ":X1%=2:Y1%=1:GOSUB 3510
1030 LX=CN*COS((360-LA)*PI/180):LY=CN*SIN((360-LA)*PI/180)
1040 X1=CX:Y1=RW:X2=X1+LX:Y2=Y1+LY:P$=" ":GOSUB 3010
1050 LX=CN*COS((360-CA)*PI/180):LY=CN*SIN((360-CA)*PI/180)
1060 X2=X1+LX:Y2=Y1+LY:P$="%":GOSUB 3010
1070 LA=CA:RETURN
1500 REM === Draw ball
1510 X1%=BX:Y1%=BY:P$="o":GOSUB 3510
1520 IF BX%<>X1% OR BY%<>Y1% THEN X1%=BX%:Y1%=BY%:P$=" ":GOSUB 3510
1530 BX%=BX:BY%=BY
1540 RETURN
2000 REM === Draw player
2010 P$="U":X1%=PX:Y1%=RW:GOSUB 3510
2020 IF PX%<>X1% THEN X1%=PX%:P$=" ":GOSUB 3510
2030 PX%=PX
2040 RETURN
2500 REM === Read the keyboard
2510 KE$=INKEY$:IF LEN(KE$)=0 THEN 2510
2520 RETURN
3000 REM === Plot a line
3010 X1%=X1:X2%=X2:Y1%=Y1:Y2%=Y2
3020 DX%=ABS(X2%-X1%):SX%=-1:IF X1%<X2% THEN SX%=1
3030 DY%=ABS(Y2%-Y1%):SY%=-1:IF Y1%<Y2% THEN SY%=1
3040 ER%=-DY%:IF DX%>DY% THEN ER%=DX%
3050 ER%=ER%/2
3060 GOSUB 3510
3070 IF X1%=X2% AND Y1%=Y2% THEN RETURN
3080 E2%=ER%
3090 IF E2%>-DX% THEN ER%=ER%-DY%:X1%=X1%+SX%
3100 IF X1%=X2% AND Y1%=Y2% THEN RETURN
3110 IF E2%<DY% THEN ER%=ER%+DX%:Y1%=Y1%+SY%
3120 IF X1%=X2% AND Y1%=Y2% THEN RETURN
3130 GOTO 3060
3500 REM === Plot a point
3510 IF X1%<1 OR X1%>CL OR Y1%<1 OR Y1%>RW THEN RETURN
3520 PRINT CHR$(27)+"="+CHR$(Y1%+32)+CHR$(X1%+32);
3530 PRINT P$;:PRINT CHR$(30)
3540 RETURN
4000 REM === Show score/lives/velocity
4010 P$="VELOCITY: "+STR$(CV)+" ":X1%=CL/3:Y1%=1:GOSUB 3510
4020 P$="SCORE: "+STR$(SC):X1%=CL*2/3:GOSUB 3510
4030 P$=MID$("   UUU",LV+1,3):X1%=CL-2:GOSUB 3510
4040 RETURN