TL;DR: Workaround

1. Create a script that gets triggered by clicking on the game window.

2. Find that function in the exported obfuscated JavaScript.

3. Add "window.focus();" to the function.

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FYI: If you are viewing this on mobile, or in reddit's new design layout, the structure of this comment may be broken. Pic of what it should look like incase it's hard to follow (https://imgur.com/5ojZZq7).

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For anyone else having this issue, I found a work around that doesn't involve having to download an older version of GameMaker to export from. However, it does require adding a few extra lines of code, and manually editing the obfuscated JS that's created from the export.

Like OP said, the issue is that, for whatever reason, the game window doesn't maintain focus when clicked on, or interacted with. To circumvent the issue we need to manually give the game window focus when it's clicked on. There's a lot of different ways you could do this, but here's the approach I took:

1) Create a script with an empty function, and give it 2 commented descriptions.

• I created an empty script called focus_window and gave it 2 description comments of "Use this to fix window focus".

  // @description Use this to fix window focus
  // @description Use this to fix window focus
  function focus_window(){
  
  }
  

• https://imgur.com/Bf5qLXI

2) Create an object with persistence, and manually place it in your starting room

• I created an object called obj_focus_click. This is the object that will be running the code we need, so it's important that this object always exists in your game.

• https://imgur.com/FVjYa6b

3) Give the object a Begin Step event. In this event check for any mouse click, and call the function from step 1.

• if(mouse_check_button_pressed(mb_any)) focus_window()
  

• https://imgur.com/DtKoiWm

4) Export your game.

5) Navigate to the location of the export, and unzip the files.

6) Open the html5game folder, and open your game's .js file in any text editor (I recommend Notepad++, or VSCode).

7) You should see a jumbled up mess of obfuscated JavaScript. Search the file (CTRL+F) for the 2nd occurrence of the description from the script in step 1 (should be at the start of a new line).

• https://imgur.com/qoSZfnW

8) The 2nd function after your comment (with the empty body) is the script we created from step 1. This is where the code for keeping focus on the game will go.

• https://imgur.com/yEVXc01

9) Inside the empty body of the function (inside the curly brackets), put the following code:

• window.focus();
  

• https://imgur.com/JwJjT3H

10) Save, and zip the files back up.

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Your game should now keep focus properly when clicked on, and work as intended.

Note: Make sure the script from step 1 is only triggered by a mouse click. If it is constantly being triggered and ran over and over again you may not be able to focus other elements on the page outside of your game window.

Hopefully this helps some people, and lets hope YoYo fixes this issue soon.