Lettermania: Player stuck on standing animation

[WyvernB]

Describe the bug

Tested on Ruffle Nightly 2023-02-13
Lettermania SWF used: ltrman.zip

This is what the game looks like in the Ruffle Demo. The character can move perfectly fine, but the character does not change its movement animation.

Lettermania.-.Demo.mp4

Expected behavior

This is what the game looks like when I launch it using Flashpoint.

Lettermania.-.Flashpoint.mp4

Affected platform

Online demo

Operating system

Windows 10

Browser

Chrome 110

Additional information

No response

[n0samu]

I'm seeing many instances of this warning:
WARN run_frame: ruffle_core::avm1::globals::movie_clip: MovieClip.swapDepths: Invalid target

[n0samu]

This is fixed by #9447! 🎉