Step 1:
The paper is a little darker on the other side.
Prefold in half over these four lines.

Step 8:
Fold in half again.

Step 6:
Fold both edges outwards, to reveal the dark side of the paper.
Do the same on the backside.

Step 13:
Make two more zig zag folds and mountain-fold on the back.

Step 12:
Fold the tip backwards.

Step 11:
Make another zig zag fold.

Step 10:
Make a zig zag fold on the upper part and fold it to the left over the line on the left.

Step 9:
Fold the tip to the spot indicated by the arrow.

Step 5:
Press the edges downwards.
Repeat steps 3 to 5 on the backside.

Step 7:
Fold both flaps in half

Step 3:
Prefold.

Step 2:
Valley-fold over the 2 lines at the bottom right, mountain-fold over the 2 diagonal lines. And valley-fold over the 2 lines at the top left.

Step 4:
Fold the upper layer upwards.

Step 14:
Mountain-fold over these two lines.

Fold over the 2 black lines and bend the feelers in random directions....  DONE!
This is a funky DIY video for folding the Woodlouse: