As of May 2015, individuals interested in reviewing Bloons TD5 by Ninja Kiwi are able to contribute their opinions online through Amazon.com or Metacritic.com. On both websites reviews enter critiques on the game's review page.
At both sites, prospective reviewers begin by clicking on Write a Review and finish by hitting the Submit button. At Amazon.com, the next page has a box in which to enter comments. Users must also enter a star rating and a headline. Reviewers must be signed in to their Amazon.com accounts.
To write a review on Metacritic.com, users must create an account or sign into the site. Reviewers enter text into a text box and rate the game on a scale from one to 10. Writers who include spoilers must indicate this by checking a box.