Update README.md

Author: pmp-p

README.md

@@ -20,7 +20,9 @@ Read Pygbag's [project description](https://pypi.org/project/pygbag/) for a more
 - Put the import statements of complex packages in order (but numpy first) at the top of `main.py`.
 - Avoid using CPython's standard library for web operations, GUI (like tkinter), or I/O as it is very synchronous/platform-specific and will probably stay that way. In terms of GUI alternatives, [pygame_gui](https://pypi.org/project/pygame_gui) works on top of [pygame-ce](https://pyga.me), [Panda3D](https://www.panda3d.org/) provides [directgui](https://docs.panda3d.org/1.10/python/programming/gui/directgui/index) and Harfang3D provides imgui. They are all cross-platform.
 - You can add a square image file named `favicon.png` in your game's root folder to make Pygbag use it as the web package's favicon.
-- Make sure all audio files are in OGG format, and all image files are compressed. (that is, not in BMP)
+- Make sure all audio files are in OGG format, and all files are compressed. (that is, not in WAV/AIFF)
+- Avoid raw formats like BMP for your image assets, they are too big for web use; use PNG/WEBP or JPG instead.
+
 - Do not use filenames like `*-pygbag.*`  that pattern is reserved for pygbag internal use (optimizing pass).
 
 Before packaging, adapt your code this way if you still want WAV/MP3 format on desktop:
@@ -53,8 +55,6 @@ if sys.platform == "emscripten":
 
 - When using webusb ftdi serial emulation, use `sudo rmmod ftdi_sio` after plugging devices.
 
-Avoid raw formats like BMP for your image assets, they are too big for web use; use PNG or JPG instead.
-
 ## Template
 
 There is actually none, because Python-WASM is just a web-friendly version of CPython REPL with [some added facilities](https://discuss.python.org/t/status-of-wasm-in-cpythons-main-branch/15542/12?u=pmp-p). Most desktop code will run (and continue to run) with only a few changes.