Again a vt100 watch only game - most of these could be hacked to be playable, but i like to watch *cough*.
I don't think this has been done here, but apologies if it's old news.

$m=2;$x=$y=4;$n=$|=1;print"\ec";$f.="\e[$_;20H|\n"for(1..11);{printf"$
+f 
\e[$y;$x\H \e[%d;%dH*\e[$l;H \e[%dH\e[7m \e[m\e[$r;40H \e[%d;40H",$y+=
+$n
*=$y<2|$y>10?-1:1,$x+=$m*=$x<3|$x>37?-1:1,$l+=($c=$l-($m>0?6:$y))?$c>0
+?-
1:1:0,$r+=($c=$r-($m<0?6:$y))?$c>0?-1:1:0,select$q,$q,$q,0.1;redo}
[download]

not super clever, but IMHO quite fun.
enjoy
alex
ps. no, they never finish.