Cartridge code (546 chars):

s="//"d=1x=64o={}j=add
q={}t=0v=1r=32m=24064p=print::E::cls(7)j(o,{x=rnd(512)-9,y=130})for i in all(o)do
i.y-=v
p("◆",i.x,i.y+4,6)p("|",i.x+2,i.y+2,4)p("◆",i.x,i.y,3)
if(i.y<-6)del(o,i)end
for i in all(q)do
i.y-=v
pset(i.x,i.y,6)
if(i.y<0)del(q,i)end
?t.." ★:"..peek4(m),4,4,0
?"웃",x,29,1
if(btn(0))s="//"d=v
if(btn(1))s="\\\\"d=-v
for i=1,4 do
if(pget(x+i,34)!=7)v=0
end
?s,x,r,13
if(v!=0)x=mid(0,x-d*2,121)for i in all({0,1,6,7})do j(q,{x=x+i,y=r})end t+=1
if(v==0)p("❎ to restart",38,64,0)
if(t>peek4(m))poke4(m,t)
if(btn(5))run()
flip()goto E