PART 2
Now you need to export the project. To Export it, click the Menu button in the upper left corner and then point the cursor to the Project tab and click Export. After clicking Export, a window will pop up in which you will have to click Scirra Arcade, then click Next and the project has been exported to download it, click Download [Project] .zip
after downloading you will have to open the publish window again and flip the Folder that has just been Exported to the Upload Your Exported Game window. Then click Upload and your game files are uploaded! Then you will have to go to the Main Game Image tab and draw a banner for your game, then click Upload again and click on the Game icons tab, then draw a game icon and upload it. There's also a Screenshots tab, and you can upload Sreenshots of your game there! Finally, click on the Publish tab and select everything there and click on Publish!
CONGRATULATIONS, YOU WAS GOING TO PUBLISH THE GAME!
For this you need Construct's paid plan.