Ember Fox: Outrun the Stone Guardian

Cephas
/
Ember Fox: Outrun the Stone Guardian
on 3 Nov 2026
1
52
17
1
9810
game.m
function g = game()
g.init=@initState;g.update=@updateState;g.render=@renderFrame;
end

function s = initState(ax)
W=150;H=112;G=30;S=.6;
ax.XLim=[0 W];ax.YLim=[0 H];hold(ax,'on')
s.ax=ax;
A=['######';'#.##.#';'######';'.####.';'.####.';'.####.';'######';'######'];
P=['..#...#...';'..#...#...';'.###.###..';'##########'];
T=[A(1:3,:);repmat('.####.',3,1);A(1:3,:);repmat('.####.',3,1);A(7:8,:)];
BA=['#........#';'##..##..##';'##########';'.########.';'..#....#..';'..........'];
BB=[flipud(BA(1:5,:));BA(6,:)];
shp={A,P,T,[A repmat('.',8,1) A],BA,BB};
b=['......#..#..';'......####..';'......#.####';'......######';'.......####.';'##....####..';'###..#####..';'############';'.##########.';'..########..';'...######...'];
L={['....##.##...';'....##......'],['....##.##...';'........##..'],['....##.##...';'....##.##...']};
s.SX=cell(1,6);s.SY=s.SX;s.DS=cell(1,3);s.DT=s.DS;s.zw=zeros(1,6);s.zh=s.zw;
for i=1:6,[s.SX{i},s.SY{i}]=spr(shp{i},S);s.zw(i)=size(shp{i},2)*S;s.zh(i)=size(shp{i},1)*S;end
for i=1:3,[s.DS{i},s.DT{i}]=spr([b;L{i}],S);end
hx=0:5:W;s.hx=hx;s.hl=patch(ax,[hx W 0],G+0*[hx W 0],'k','EdgeColor','none');
s.stl=plot(ax,rand(1,28)*W,G+14+rand(1,28)*(H-G-16),'.','MarkerSize',6);
th=linspace(0,2*pi,24);s.th=th;
s.gl=plot(ax,[0 W],[G G],'LineWidth',2);
s.hb=patch(ax,NaN,NaN,[.5 .45 .42],'EdgeColor',[.2 .15 .1],'LineWidth',2);s.hbl=plot(ax,NaN,NaN,'Color',[.2 .15 .1],'LineWidth',2);
s.ho=gobjects(1,4);for i=1:4,s.ho(i)=patch(ax,NaN,NaN,'k','EdgeColor','none');end
s.hd=patch(ax,NaN,NaN,'k','EdgeColor','none');
s.pu=plot(ax,NaN,NaN,'o','MarkerSize',16,'LineWidth',2);
s.sh=plot(ax,NaN,NaN,'o','MarkerSize',48,'LineWidth',1.5,'Color',[.1 .7 .9]);
fo={'HorizontalAlignment','center','FontName','monospaced','FontWeight','bold'};
s.sct=text(ax,W-3,H-6,'','HorizontalAlignment','right','FontName','monospaced','FontWeight','bold','FontSize',15);
s.mid=text(ax,W/2,H*.64,'',fo{:},'FontSize',28);
s.sub=text(ax,W/2,H*.5,'',fo{:},'FontSize',11);
set(ax.Children,'HitTest','off','PickableParts','none');
s.st=0;s.hi=0;s=newgame(s);
end

function s = newgame(s)
s.sc=0;s.dist=0;s.spd=55;s.dy=0;s.vy=0;s.air=false;s.ot=zeros(1,4);s.ox=s.ot-99;s.oy=s.ot;s.ow=s.ot;s.oh=s.ot;s.op=false(1,4);
s.streak=0;s.mu=1;s.shd=false;s.slw=0;s.inv=0;s.nxt=45;s.gp=30;s.put=0;s.pucd=9;s.pux=0;s.puy=0;s.dtm=0;
end

function s = updateState(s,dt,pressed)
G=30;DX=18;W=150;
s.dtm=s.dtm+dt;s.inv=max(0,s.inv-dt);s.pucd=s.pucd-dt*(s.st==1);
if pressed
 if s.st==1
  if s.air
   if s.vy>-150,s.vy=-230;end
  else
   s.vy=100;s.air=true;
  end
 elseif s.st==0||s.dtm>.5
  s=newgame(s);s.st=1;s.vy=100;s.air=true;
 end
end
if s.st~=1,return,end
w=dt;if s.slw>0,s.slw=s.slw-dt;w=dt*.55;end
s.spd=55+90*(1-exp(-s.sc/900));s.dist=s.dist+s.spd*w;s.sc=s.sc+s.spd*w*.12*s.mu;s.gp=min(30,s.gp+1.5*w);
if s.air
 s.vy=s.vy-260*w;s.dy=s.dy+s.vy*w;
 if s.dy<=0,s.dy=0;s.vy=0;s.air=false;end
end
s.nxt=s.nxt-s.spd*w;j=find(s.ot==0,1);
if s.nxt<=0&&~isempty(j)
 if s.sc>120&&rand<.3
  v=[1 9 17];s.ot(j)=5;s.oy(j)=G+v(randi(3));
 else
  s.ot(j)=randi(min(4,2+floor(s.sc/120)));s.oy(j)=G;
 end
 s.ow(j)=s.zw(s.ot(j));s.oh(j)=s.zh(s.ot(j));s.ox(j)=W+5;s.op(j)=false;s.nxt=s.ow(j)+s.spd*(.7+.8*rand);
end
if s.pucd<=0&&s.put==0,s.put=randi(3);s.pux=W+5;s.puy=G+5+rand*12;s.pucd=14+rand*10;end
if s.put>0
 s.pux=s.pux-s.spd*w;
 if abs(s.pux-DX-3.6)<5&&abs(s.puy-G-s.dy-4)<6
  if s.put==1,s.shd=true;elseif s.put==2,s.slw=5;else,s.gp=min(30,s.gp+14);end
  s.put=0;
 elseif s.pux<-5,s.put=0;end
end
for j=1:4
 if s.ot(j)==0,continue,end
 s.ox(j)=s.ox(j)-s.spd*w;
 if ~s.op(j)&&s.ox(j)+s.ow(j)<DX
  s.op(j)=true;s.streak=s.streak+1;s.mu=1+floor(s.streak/5);
 end
 if s.ox(j)<-12,s.ot(j)=0;continue,end
 y0=G+s.dy+.4;
 if G+s.dy+7.2>s.oy(j)&&y0<s.oy(j)+s.oh(j)-.4&&DX+6>s.ox(j)+.5&&DX+1.2<s.ox(j)+s.ow(j)-.5
  if s.ot(j)==5&&s.vy<-30&&y0>s.oy(j)+s.oh(j)-3
   s.ot(j)=0;s.vy=95;s.sc=s.sc+50*s.mu;s.streak=s.streak+1;s.gp=min(30,s.gp+4);
  elseif s.inv>0
  elseif s.shd
   s.shd=false;s.inv=1.2;s.ot(j)=0;
  else
   s.gp=s.gp-9;s.inv=1.4;s.ot(j)=0;s.streak=0;s.mu=1;
   if s.gp<11,s.st=2;s.dtm=0;s.hi=max(s.hi,floor(s.sc));return,end
  end
 end
end
end

function renderFrame(~,s)
G=30;DX=18;
nn=.5-.5*cos(2*pi*s.dist/3200);q=round(nn*40)+100*(s.st==2);
if ~isequal(s.ax.UserData,q)
 s.ax.UserData=q;fg=[.25 .1 .02]*(1-nn)+[1 .8 .35]*nn;bg=[.99 .85 .55]*(1-nn)+[.08 .04 .16]*nn;
 s.ax.Color=bg;set(s.ho,'FaceColor',fg);s.hd.FaceColor=[.85 .3 .05];if s.st==2,s.hd.FaceColor=[.5 .5 .5];end
 set([s.mid s.sub s.gl s.sct],'Color',fg);set(s.stl,'Color',bg*(1-nn^3)+fg*nn^3);set(s.hl,'FaceColor',bg*.9+fg*.1);
end
m1='';m2='';
if s.st==0,m1='EMBER FOX';m2='tap = hop   tap in air = dive';
elseif s.st==2,m1='C R U S H E D';m2=sprintf('score %d | tap to retry',floor(s.sc));end
if ~strcmp(s.mid.String,m1),s.mid.String=m1;s.sub.String=m2;end
hx=s.hx;set(s.hl,'YData',[G+2.5+2*sin((hx+s.dist*.15)/9)+1.5*sin((hx+s.dist*.15)/4.1) G G]);
if s.gp<29.5
 cb=DX+3-s.gp;a=s.dist/8;
 set(s.hb,'XData',cb+8*cos(s.th),'YData',G+8+8*sin(s.th))
 set(s.hbl,'XData',cb+[0 7*cos(a)],'YData',G+8+[0 7*sin(a)])
elseif ~isnan(s.hb.XData(1))
 set([s.hb s.hbl],'XData',NaN,'YData',NaN)
end
for m=1:4
 if s.ot(m)>0
  k=s.ot(m);if k==5,k=5+mod(floor(s.dist/6),2);end
  set(s.ho(m),'XData',s.SX{k}+s.ox(m),'YData',s.SY{k}+s.oy(m))
 elseif ~isnan(s.ho(m).XData(1))
  set(s.ho(m),'XData',NaN,'YData',NaN)
 end
end
k=1+mod(floor(s.dist/9),2);if s.air,k=3;end
set(s.hd,'XData',s.DS{k}+DX,'YData',s.DT{k}+G+s.dy)
if s.shd,set(s.sh,'XData',DX+3.6,'YData',G+s.dy+4);elseif ~isnan(s.sh.XData(1)),set(s.sh,'XData',NaN,'YData',NaN);end
cols=[.1 .7 .9;.95 .6 0;.9 .2 .6];
if s.put>0
 set(s.pu,'XData',s.pux,'YData',s.puy,'Color',cols(s.put,:),'MarkerFaceColor',cols(s.put,:))
elseif ~isnan(s.pu.XData(1))
 set(s.pu,'XData',NaN,'YData',NaN)
end
t=sprintf('HI %05d   %05d',s.hi,floor(s.sc));if s.mu>1,t=[t sprintf('  x%d',s.mu)];end
if s.slw>0,t=[t '  SLOW'];end
if ~strcmp(s.sct.String,t),s.sct.String=t;end
end

function [X,Y]=spr(A,k)
X=[];Y=[];h=size(A,1);
for r=1:h
 d=diff([0 A(r,:)=='#' 0]);a=find(d==1);e=find(d==-1);
 for q=1:numel(a)
  X(:,end+1)=[a(q)-1;e(q)-1;e(q)-1;a(q)-1];Y(:,end+1)=h-r+[0;0;1;1];
 end
end
X=X*k;Y=Y*k;
end
Play Game
Preview

Play Game opens this in MATLAB Drive. Click Run this app there to play.