I'm only good at the scratch game engine-like software.
........... you can use it's your choice but I'm also using a game engine known as Clickteam fusion 2.5 because I'm good in that
Thank You
You can use whatever game engine/tools you want! Feel free to use something you are used to or maybe try to use something new!
On a side note, make sure that you can export your game from Scratch and distribute it through itch.io (as it is a requirement).
On another side note, I am NOT part of the organization team and my answers are based on my interpretation of the rules :)
You can use anything you want but you must be able to upload it to itch.io.
In the future, please put your questions in the FAQ thread!