Open the yellow door of the cupboard

Have you opened the yellow door with the five-bar lock?

After you open it, you'll see an image of a yellow-and-red statue and the letter R (and get a marker eraser). There's an arrow on the R. Look around and see if that rings any bells.

there is a clue to the shapes very near to the pots

under the figures are colored pots in order 1-4, next to them are 4 stacks of 2 pots. Just go in order, there is only one color that matches the dolls in each stack

I'd spotted the fins were hearts, but the tails threw me.

Is behind the left-hand painting, which you open with the star key you get from the red drawer above the yellow one in question.

You might want to double-check your chart?

There's a color mixing chart behind the flowers on the table, which I had kind of glanced at and ignored because I know that yellow and blue make green, thankyouverymuch. As a result, I missed the orange stripey trapezoid shape at the bottom of the paper.

• Chair view
  

  • Tall shelf
    

    • Birds and stuff
      

      The birds are just a color clue.
      

      Birds are purple in this world.

      The moon, heart, and fish are a color clue...
      

      yellow moon, red heart, blue fish

      ...as well as a clue to another puzzle.
      

      Namely, the right picture.

      To get the key, solve the rainbow bird contraption.
      

      Examine the item you got.
      

      It opens to reveal a knife.

    • Big red drawer (left-right buttons)
      

      Part of the clue is in plain sight.
      

      Turn to the door and look at the shelves.

      But those figurines aren't arranged linearly, so we need another clue.
      

      Open the big yellow drawer below this one.

      Put the two together to get a left-right sequence.
      

      The yellow drawer tells you that the arm with the black squiggle is the one to look at (the figure in the clue has the squiggle on the right, and there's a big letter R next to it). It also tells you to "read" the shelves in the shape of an R.
      

      RLRLRLL

      Get: blue marker and a hand-signal alphabet.
      

    • Big yellow drawer (5 sliders)
      

      Check the chair.
      

      Specifically, look at the little red horizontal slats. If 1 is top and 3 is bottom, they're arranged 32123.

      Get: white marker (aka eraser) and a clue having to do with the yellow and red abstract statues.
      

    • Big blue drawer (4 digits)
      

      The clue is in plain sight, albeit kinda hard to see. (Does that make sense?)
      

      Look to the right.
      

      The cubbyholes with the jars are actually numbers: 3285.

      Get: a mannequin.
      

  • Left picture (hats and a balloon?)
    

    • Key
      

      It's the flower-shaped key from the small red drawer.
      

    • Puzzle
      

      It's a standard connect-the-shapes puzzle.
      

      From the top diamond, go down two squares to the other diamond. (So vertical, then top-right.)
      From the top spade, go right three squares, down four squares, and left two squares. (top-right, horizontal, left-bottom, vertical, vertical, top-left, horizontal)
      From the top heart, go right two squares and down four squares. (horizontal, left-bottom, vertical, vertical, vertical, vertical)
      This leaves three squares to connect the two clubs. (From left to right: bottom-right, horizontal, top-left)
      

      Get the puzzle piece, and note the red and black pattern.
      

  • Right picture (a forest?)
    

    • Key
      

      It's the knobby key you get from the mannequins.
      

    • Puzzle
      

      The clue is at the top of the tall cabinet: a moon, heart, and fish, hanging in that order. You need to trace a path that covers the entire grid, always following the moon-heart-fish-moon-heart-fish sequence, starting and finishing where indicated.
      

      Down, down, left; up, left, down; down, down, right; up, right, down; right, right, right; up, left, left; up, up, right; down, right, up

      Get the puzzle piece.
      

  • Mannequins
    

    (There's a clue, or rather part of a clue, on the pedestals the mannequins are standing on.)
    To solve the mannequin puzzle itself, first you need to acquire a fourth mannequin.
    

    Open the big blue drawer just to the left of the mannequins.

    Next, you need to arrange the mannequin's arms correctly.
    

    Solve, or at least bring into focus, the puzzle behind the picture in the door view.
    

    The arms should point down and to the sides at 45 degree angles.

    Then you just need to put the properly-arranged fourth mannequin on its pedestal.
    Get the knobby key (the fourth mannequin's head), and part of the clue for the 4-letter code on the small blue drawer.
    

  • Jars
    

    These are part of the clue for the small red drawer. The shelves/cubbyholes they're in are also a clue, for the big blue drawer.
    

• Window view
  

  • Rainbow bird contraption
    

    This one's simple, if you're not colorblind: just click the colored parts of the feathers in rainbow order, which is conveniently even written at the base of the contraption.
    

    The feathers on the left side, top to bottom, are yellow, indigo, orange, and green. On the right, they're brown, blue, red, and violet. So if you number them from top to bottom, click R3, L3, L1, L4, R2, L2, R4.

    Get the brown feather.
    

  • Small red drawer (4 shapes)
    

    The mannequins and the jars tell you what to do.
    

    The pedestals for the mannequins are numbered 1 to 4 (although with Roman numerals), and they each have a picture of a jar.
    

    I = red, II = yellow, III = blue, IV = red

    Note the shapes on the appropriate-colored jars.
    

    I = circle, II = square, III = diamond, IV = trapezoid

    Get: red marker, flower-shaped key
    

  • Small yellow drawer (5x5 grid)
    

    To get the clue, solve the puzzle behind the left-hand picture in the chair view.
    

    RBRRR
RBBBR
RRBBR
BBBBR
BBBBR

    Get a puzzle piece.
    

  • Small blue drawer (4 letters)
    

    There are two parts to this clue: you get one from the mannequins, and one from the big red drawer.
    

    OK, so it's not from the mannequins so much as it is the mannequins, or rather their arms. Use the hand-signal alphabet clue from the big red drawer to figure out what letter each mannequin is signaling.
    

    north, east = J; northwest, west = O; southwest, south = A; southwest, southeast = N

    Get the yellow marker.
    

• Easel view
  

  • Easel
    

    • Puzzle:
      Location of pieces
      

      1. Under the chair

      2. Chair view, solve the puzzle behind the left picture

      3. Chair view, solve the puzzle behind the right picture

      4. In the second window from the right (raise the blinds)

      5. Small yellow drawer

      6. Easel view, at the base of the lamp

      7. Easel view, on the table

      8. Door view, solve the puzzle behind the picture

      Solving
      

      It's a "click two squares to switch them" puzzle. The moon goes in the top left quadrant, the boat (with the bird sitting on it) goes in the top right quadrant, and the biggest fish goes in the bottom left quadrant. When you get it right, it'll briefly say "Prepared", and you won't be able to move the pieces anymore.
      

    • Markers
      

      (Colorblind: note that the markers say what color they are if you examine them.)
      

      • White/eraser: big yellow drawer

      • Red: small red drawer

      • Blue: big red drawer

      • Yellow: small blue drawer

    • Colors
      

      Bird, moon, heart, fish: top of the tall shelf

      Bird = purple, moon = yellow, heart = red, fish = blue

      Stars, triangles: plug in and turn on the lamp

      stars = yellow, triangles = green

      Boat: color mixing chart on the table

      orange

      Note that simple shapes override complex shapes; or, to put it another way, notice that the fish have heart-shaped fins and triangular tails, while the bird's wing is a heart shape.
      If you put the wrong color somewhere, use the white marker to erase it.
      

      With the yellow marker, click: the moon, the three stars, the sail of the boat, the boat itself, and the tail of each fish.
      With the red marker, click: the bird, the bird's wing, the boat (but not the sail), and the fins of the fish.
      With the blue marker, click: the bird, the sail, the bodies of the fish, and the tails of the fish.

      Get the ornate key and use it to go out the door.
      

  • Lamp
    

    Plug the lamp in, then click the round knob at the top to turn it on.
    

    It's a color clue to the last puzzle: yellow stars, green triangles.

  • Table
    

    There's a color mixing hint here, in case you need it. (It's that bit of white to the right of the flowers.)
    

    There's also a color hint on the paper: note the shape at the bottom.
    

    It's an orange trapezoid.

• Door view
  

  • Picture (I can't even make a guess as to what this is trying to depict, sorry)
    

    • Key
      

      It's the oval key from the top of the tall shelf.
      

    • Puzzle
      

      Use the buttons to focus and align the picture appropriately.
      

      Click the top right button until the picture comes into focus. Next, click the top left button until the head of the mannequin is about the same size as the blue oval at the top of the frame. (5 clicks ought to do it; if you go too far, use the bottom left button to zoom back in.) Now use the arrows to move the picture up and to the left until the head of the mannequin lines up with the blue oval.

      Get the puzzle piece. Also, note the position of the mannequin's arms.
      

1. Big blue drawer

2. Big yellow drawer

3. Big red drawer

4. Small red drawer

5. Chair view left picture

6. Small yellow drawer

7. Rainbow bird

8. Door view picture

9. Mannequins

10. Chair view right picture

11. Small blue drawer

12. Easel

Connected the four suits correctly and got no response. Closed and reloaded the page, replayed the game, and the second time it worked fine. So it's the game, not you.