Twaffic

My first #tweettweetjam, a tiny game made in a few days in PICO-8, with source code that fits in two tweets (560 characters including the graphics, which are created by poke()-ing values to memory at game start). Try to make it past all 4 levels-- it's possible, but the third and forth levels are challenging.

Note that your only controls are the up and down arrows, you can't move side to side.

Source code: 

p=poke4 p(132,0x2.2222)p(196,0xcc2.2222)p(260,0xc0c2.2228)p(324,0xccc2.2222)p(388,0x606.0606)p(452,0x60.006) g=1::s::y=123::r::cls()srand(8) for i=1,g*3do z=i*33/g 5 l=4 i*3 pal(2,rnd(9) 7) d=i%2*2-1 x=d*t()*(rnd(50) 9) n=0if(l<8)n=1 for j=0,n do x=(x j*99)5-32 sspr(8,0,8,8,x,z,2*l,8,d<0) if abs(x l 4*d-67)<l-1 and abs(z-y 2)<5.5then ?"❎",63,y,8 for i=1,30do flip()end goto s end end end b=btnp()y =3*(b\8%2-b\4%2) ?"twaffic" ?"★ lvl "..g.."/4",63,0,10 ?"⬆️",63,y,11 if y<6then g =1 if(g>4)cls(3)print("win",56,60,7)stop() goto s end flip()goto r