Mind Cubes 11-15

Solution #11:
Orange (from the left side) - U3, R4, U1.

Yellow (from the bottom) - L2, D2, continue around the outermost possible squares.

Red - There should be a path from one to the other.

Solution #12:
Green (from the top corner) - Follow the edge to the right/down to the other green square.

Orange - Straight line, 4 squares.

Red (from the right) - D2, L2, U1, L1, U1, L4, D2.

Yellow (from the top face) - U4, follow all the way to the bottom left corner, R2, U3, R2, D1.

Purple (from top face) - D/R1, R1, D2.

Blue - Complete the remaining squares.

Solution #13:
Red - Shortest route possible.

Orange - Wrap around the top/left side of red.

Yellow (top face) - D4, R2.

Purple (top face) - D/R5, L2.

Blue (bottom left) - Follow the entire way around the puzzle to meet the other side.

Green - Follow the remaining path.

Solution #14:
Yellow - Shortest possible distance, straight line.

Purple - Hug the left side of the puzzle until the two meet.

Blue (from the square on the top face) - L/U1, R/U4, L/U3, L/D2, R/D1, L/D2.

Green - Follow the path of grey squares remaining.

Solution #15:
Blue - Shortest possible distance, 3 squares.

Red (from the right) - D2, L2, U2, L3.

Green - Wrap around the red towards the bottom left.

Yellow - Wrap around the green towards the bottom left.

Purple - All the way around the yellow.