If you're up for a new challenge: in one of the MCCM's there was a Tetris in 4 lines of BASIC. Iirc it was a complete Tetris, no fancy colors or so, but all the standard blocks fully supported. Can you beat that?

Sounds like there is no much left to optimize

It would be anyway nice if you could post the source for us to learn.

Sorry for the delay. Here is finally a version with the scrolling timed better. What do you say NYYRIKKI, is it final?

1 J=S-J*(J<96-S):K=J\16:FORW=0TO2:VPOKE8208+W,P(W+K):NEXT:IFTTHENRESUMENEXTELSEONERRORGOTO1:DEFINTA-Y:COLOR15,5,1:KEYOFF:SCREEN2,3,0:U=255:V=32:FORX=-1TO1:FORY=0TO31:M=16-Y\2:LINE(M-X*((SIN(Y^.8/6)-(Y<16))*6-M-2)+(X<1),V+X*V+Y)-STEP(Y+1,0)
2 P(Y\4)=50-15*(Y\12AND1):NEXTY,X:N=14336:FORI=0TO383:VPOKEN+I,VPEEK((IAND7)+(IAND8)*V+(IAND48)\2+(IAND448)*8):NEXT:S$="3##B#C#c$B'r$B&s3#%##C#3%S';%S&s;##2#3#B#R#B#<=c'##c'#@C#)#2#,s##&wfw:w3w4w$w3w#w4w,DD0CDDDS0CDSDK0CDKDC0CDC":SOUND3,14
3 SCREEN1:FORO=0TO53:Y=0:FORM=MTOM+1:Y=Y*96+(ASC(MID$(S$,M))-35):NEXT:FORK=KTOK+Y\256:VPOKEK+N+I+8335*(O>V),YANDU:NEXTK,O:FORI=UTO1023:O=VPEEK(I):VPOKEI,(OORO\2)\(2-(IAND4)\4):NEXT:FORI=ITO1279:O=IANDV:VPOKE6432+(IAND63),228+8*(IAND3)-O
4 W=2^(IAND7):J=O*U\W\64:VPOKEI+512,JAND-W:VPOKEI+768,JOR-WANDU:J=8-O\8:VPOKEI,(JANDI)*U\J:NEXT:R=N\2:VPOKE8192,14:VPOKE1209,U:PLAY"v15o5arararo6aa":FORW=9TO10:PUTSPRITEW,(16+64*W,159),14,W-3:SOUNDW,14:N=N+9:NEXT:TIME=0:SOUND5,83:FORT=2TOR
5 PUTSPRITE0,(X+80,156),1,12:G=G+F*S\2:LOCATE1,1:D=96-(NAND127):Y=D>0:D=D*D\96(:PRINTUSING"SPEED:##0kmh  !  RANK:###";S;CHR$(76-L*4);N\128-82(:FORW=8216TO8219:G=G+8AND31:VPOKEW,86+(GAND16):VPOKE4+W,85+G\24:NEXT:@:Q=O:IFC<TTHENC=9+T+TMOD99
6 O=PEEK(-1043):T=T+S-1:F=B:B=(R-T>99)*(1-CMOD3):L=(QANDO+Q)+LAND1:S=S+(0=(OAND64))-(0=(OANDV))*(2-((S>9)=-L)):S=(S>14+L*6)*(L+2)-(S>0)*(S-1)(:FORW=3TO4:PUTSPRITEW+1,(F*10+W*V,95),14,4*B+W+1:PUTSPRITE3+W,(W*V,127),14,4*F+3+W:NEXT:@
7 PUTSPRITE1,(115-(D<34)*((24-D)*B+F*10)+(E-64)*D\225,-Y*(98+D)-31),6,15-D\25-(T>R)*9:M=(X>72)-(X<0):E=NAND128:N=N+9-S:S=S*((X-15-E\3)\15<>0ORD<73)*(M=0):SOUND4,U-S*9(:X=X+5*(M-(0=(OAND128))+(0=(OAND16)))-S*B\4:FORW=0TO0:W=PLAY(0):NEXTW,T
8 S=15:Z$=SPACE$(S)+"Race Over  Time ="+STR$((TIME\(6-PEEK(43)\128))/10)+"s":FORN=0TOU:D=88-3*N:LOCATE6,4:PUTSPRITE0,(116-(36-X)*D\126,(68+D)-(D<0)*128),1,S-D\24:+:PRINTMID$(Z$+Z$,NMOD38+1,S):SOUND(1ANDN)+9,-(D>0)*D\6:NEXT:SCREEN0:CLEAR

Yes, now the scrolling works much better... Let's call this final version.

Thank you, it was pleasure to make this with you!

Are you two absolutely sure this is a final? If so - can we add it to the downloads database? ^_^

Yes, I think so...

Actually I think it's time to check that all entrys are in download database and wrap this whole IOMBCC
together as there has been no new entrys in few years. Has anyone any good ideas, how the compo
should be judged? Anyone that has needed knowledge but no entry?

I think that entrys that I've made should be actually disqualifyed as I made the
rules in the first place. Snout, do you want to take over the compo hosting?

Yes I think we're done now. You can replace the current rally entry in the IOMBCC download section if you want snout.

Snout, it would be nice if the IOMBCC downloads weren't tokenized basic files.
Plain text files is better so they can be viewed in a regular text editor on a PC.