For 486, no FPU, for MsDos FreeDos, WinXP Dos, DosBox-X ... i made that rather in a hurry, so right now i have a version without background but wall bouncing like the original. But since the competition is already over, i will tinker a bit to make it perfect :)

the blank code for everbody who can read it ^^ you can paste it to http://twt86.co/ to run in a browser

  org 100h
  mov al,0x13
  les bp,[bx]
  int 0x10
  X: sub dh,95
  mov al,[bp+si]
  add dl,al
  imul al
  sub dh,ah
  mov bx,dx      
  mov al,bh      
  imul al        
  xchg ax,dx    
  imul al       
  add dx,ax   
  mov ch,7
  imul ax,di,byte 102
  sub ch,dh
  jle F        
  mov al,bl    
  cbw           
  idiv ch        
  add al,[bp+si] 
  xor al,bh      
  and al,16    
  mov al,31      
  jnz F           
  add al,9     
  F: stosb
  mov ax,0xCCCC
  mul di 
  adc byte [bp+si],cl 
  jmp short X