Having trouble loading my game in a browser - how do I fix this?

You need to optimize the graphics in your game. The number of images doesn't matter, but their size does. The images in your game are insanely huge!

First of all, why your viewport size is set to 10000x5000? What kind of monitor supports this resolution? You need to set the viewport size to something like 1920x1080 and then resize all images (in the animation editor, not on the layout!) to fit the viewport.

For example, if the sprite target size on the screen is going to be 100x100 px, then the image itself should not be larger than 100x100 px. If your image is 4000x4000px and it is scaled down to 100x100 px when it's shown to players, you are wasting A LOT of storage, bandwidth and memory!

Once you optimize the graphics and reduce the size of your game significantly, then it should work when uploaded to web.

I also suggest re-compressing png images after export, this can shave off a few extra MB from the game size. But you need to resize images in the game first!

Also, crop the empty space in images. For example, your Sprite11 resolution is 7200x4800, and about 90% of it is empty space. This sprite alone takes about 150MB of memory when loaded! This is absolutely unacceptable for web games. Your entire game should use that much!

Click the Crop icon on the toolbar to remove all the empty space, and then resize the image to something like 600x800, preserving the aspect ratio.