Purr-kour

Hannah U
/
Purr-kour
on 12 Nov 2026
1
7
2
1
7099
game.m
function g = game()
%CAT AND APPLES A one-button cat runner.
g.init = @initState; g.update = @updateState; g.render = @renderFrame;
end

function state = initState(ax)
state.n = 6; state.cx = 145; state.cy = 465; state.cw = 62; state.ch = 80;
state.ground = 545; state.vy = 0; state.gravity = 2050; state.jump = -790;
state.t = 0; state.next = 1.4; state.score = 0;
state.lives = 2; state.seed = 17; state.restartLock = 0;
state.started = false; state.over = false; state.live = false(1,state.n);
state.ax = 900*ones(1,state.n);
state.av = zeros(1,state.n); state.bonus = false(1,state.n);
ax.YDir = 'reverse'; ax.Color = [.37 .76 .94];
state.g.cloud = text(ax,120,105,'☁  ☁','Color','w','FontSize',34, ...
    'HitTest','off','PickableParts','none');
state.g.ground = rectangle(ax,'Position',[0 545 800 55],'FaceColor',[.22 .62 .28], ...
    'EdgeColor','none','HitTest','off','PickableParts','none');
state.g.cat = rectangle(ax,'Position',[state.cx state.cy state.cw state.ch], ...
    'Curvature',[.45 .45],'FaceColor',[.95 .61 .22],'EdgeColor',[.45 .20 .08], ...
    'LineWidth',2,'HitTest','off','PickableParts','none');
state.g.ear1 = patch(ax,[0 0 0],[0 0 0],[.95 .61 .22], ...
    'EdgeColor',[.45 .20 .08],'HitTest','off','PickableParts','none');
state.g.ear2 = patch(ax,[0 0 0],[0 0 0],[.95 .61 .22], ...
    'EdgeColor',[.45 .20 .08],'HitTest','off','PickableParts','none');
state.g.face = text(ax,state.cx+31,state.cy+38,'•  •', ...
    'HorizontalAlignment','center','Color',[.18 .12 .08],'FontSize',15, ...
    'FontWeight','bold','HitTest','off','PickableParts','none');
state.g.score = text(ax,25,42,'APPLES JUMPED  0','Color',[.16 .25 .35], ...
    'FontSize',19,'FontWeight','bold','HitTest','off','PickableParts','none');
state.g.lives = text(ax,25,70,'LIVES  2','Color',[.16 .25 .35], ...
    'FontSize',16,'FontWeight','bold','HitTest','off','PickableParts','none');
state.g.status = text(ax,400,250,'CAT AND APPLES','Color','w', ...
    'FontSize',33,'FontWeight','bold','HorizontalAlignment','center', ...
    'HitTest','off','PickableParts','none');
state.g.help = text(ax,400,300,'PRESS SPACE TO START','Color','w', ...
    'FontSize',17,'HorizontalAlignment','center','HitTest','off','PickableParts','none');
for k = 1:state.n
    state.g.apple(k) = rectangle(ax,'Position',[900 510 32 32], ...
        'Curvature',[1 1],'FaceColor',[.91 .12 .10],'EdgeColor',[.45 .05 .04], ...
        'Visible','off','HitTest','off','PickableParts','none');
    state.g.leaf(k) = line(ax,[0 0],[0 0],'Color',[.08 .47 .12], ...
        'LineWidth',4,'Visible','off','HitTest','off','PickableParts','none');
end
end

function state = updateState(state,dt,pressed)
if state.over
    state.restartLock = max(0,state.restartLock-dt);
    if pressed && state.restartLock == 0, state = resetRound(state); end
    return
end
if ~state.started
    if pressed, state.started = true; end
    return
end
if pressed && state.cy >= state.ground-state.ch-.5, state.vy = state.jump; end
state.vy = state.vy + state.gravity*dt;
state.cy = min(state.ground-state.ch,state.cy + state.vy*dt);
if state.cy >= state.ground-state.ch, state.vy = 0; end
state.t = state.t + dt;
if state.t >= state.next
    slot = find(~state.live,1);
    if ~isempty(slot)
        state.seed = mod(71*state.seed+29,997);
        state.live(slot) = true; state.ax(slot) = 830;
        state.av(slot) = 230 + mod(state.seed,230);
        state.bonus(slot) = mod(state.seed,11) == 0;
    end
    state.next = state.t + max(.72,1.36-.018*state.score);
end
for k = find(state.live)
    state.ax(k) = state.ax(k) - state.av(k)*dt;
    hit = state.ax(k) < state.cx+state.cw-10 && state.ax(k)+32 > state.cx+10 ...
        && state.cy+state.ch > 510;
    if hit
        state.live(k) = false;
        if state.bonus(k)
            state.lives = state.lives + 1;
        else
            state.lives = state.lives - 1;
            if state.lives < 1
                state.over = true; state.restartLock = .4;
            end
        end
    end
    if state.ax(k) < -35
        state.live(k) = false; state.score = state.score + 1;
        if state.bonus(k), state.lives = state.lives + 1; end
    end
end
end

function renderFrame(~,state)
state.g.cat.Position = [state.cx state.cy state.cw state.ch];
state.g.ear1.XData = [state.cx+10 state.cx+25 state.cx+30];
state.g.ear1.YData = [state.cy+15 state.cy-15 state.cy+18];
state.g.ear2.XData = [state.cx+35 state.cx+48 state.cx+55];
state.g.ear2.YData = [state.cy+17 state.cy-13 state.cy+17];
state.g.face.Position = [state.cx+31 state.cy+40 0];
state.g.score.String = sprintf('APPLES JUMPED  %d',state.score);
state.g.lives.String = sprintf('LIVES  %d',state.lives);
for k = 1:state.n
    if state.live(k)
        state.g.apple(k).Position = [state.ax(k) 510 32 32];
        if state.bonus(k)
            state.g.apple(k).FaceColor = [.78 .64 .96];
            state.g.apple(k).EdgeColor = [.44 .25 .65];
        else
            state.g.apple(k).FaceColor = [.91 .12 .10];
            state.g.apple(k).EdgeColor = [.45 .05 .04];
        end
        state.g.apple(k).Visible = 'on';
        state.g.leaf(k).XData = [state.ax(k)+16 state.ax(k)+23];
        state.g.leaf(k).YData = [512 503]; state.g.leaf(k).Visible = 'on';
    else
        state.g.apple(k).Visible = 'off'; state.g.leaf(k).Visible = 'off';
    end
end
if state.over
    state.g.status.String = sprintf('OOPS!  %d APPLES JUMPED',state.score);
    if state.restartLock > 0
        state.g.help.String = 'GAME OVER';
    else
        state.g.help.String = 'PRESS SPACE TO TRY AGAIN';
    end
elseif ~state.started
    state.g.status.String = 'CAT AND APPLES';
    state.g.help.String = 'PRESS SPACE TO START';
else
    state.g.status.String = '';
    state.g.help.String = 'SPACE = JUMP   •   PURPLE APPLES = +1 LIFE';
end
end

function state = resetRound(state)
state.cy = state.ground-state.ch; state.vy = 0; state.score = 0; state.lives = 2;
state.t = 0; state.next = 1.4; state.started = true; state.over = false;
state.live(:) = false; state.ax(:) = 900; state.av(:) = 0;
state.bonus(:) = false; state.seed = 17; state.restartLock = 0;
end
Play Game
Preview

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