Here is a corrected version of your list and a short, simple explanation of the grammar fixes.
- Round target
- Oval swing chair
- Spherical globe
- Square map
- Rectangular flag
- Cubic street organ
- Triangular sign
- Diamond-shaped kite
- Pyramid-shaped tent
- Cylindrical crawling tunnel
- Trapezoidal boat
- Star-shaped piñata
- Hexagonal spider web
- Heart-shaped glasses
- Capitalization: I started each item with a capital letter so the list looks neat and consistent.
- Hyphens: When a shape-word describes another noun, use a hyphen for the compound adjective before the noun: diamond-shaped kite, pyramid-shaped tent, star-shaped piñata, heart-shaped glasses. I replaced the en-dash you had with a normal hyphen.
- Adjective choice: Some shapes have adjective forms (spherical, rectangular, cubic, triangular, cylindrical, hexagonal, trapezoidal). I used those where they sound natural.
- Parallel structure: I kept the pattern adjective + noun for every item so the list matches and reads smoothly.
- Accent: I added the tilde in "piñata" so it is spelled correctly: piñata.
- Optional note: A phrase like "spherical globe" is a bit redundant because a globe is already round, but it's not wrong.
If you want the list in all lowercase or a different style, tell me and I can change it to match your preference.