I thank you for your contribution. Here are my thoughts;

* What you are doing here is teaching same thing over and over again just with different examples. Your older tutorials are teaching the same concept just with different kind of games. Here are the tutorials that I'm talking about;
  * https://steemit.com/utopian-io/@onepice/tank-fire-game-using-html-svg-part-2
  * https://steemit.com/utopian-io/@onepice/making-snake-game-using-html-5-svg-with-pablojs-part-1 

  As you can see, you already teached setInterval and math etc.


* You might consider changing topics to preserve some uniqueness. Similar content can be easily found on the internet. Being unique with tutorials on Utopian is not required, but preferable as we value rare posts more than other.

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