Features & Limitations - aeryli/Scratch-3DS GitHub Wiki

1. Unique Features

Any un-edited scratch project will be displayed on the Top Screen only.
If using a modded Scratch client like Turbowarp, you can go into the projects' Advanced Settings and change the resolution.
- Setting it to 400x480 will enable both the top and bottom screen.
- Setting it to 320x240 will enable only the Bottom screen.
- Setting it to 400x240 will make the project perfectly fit to the top screen.
- NOTE: make sure to click Store Settings In Project on Turbowarp to properly apply the settings.

Currently, projects display exactly the same on both the TV and the Gamepad, and there's no way to change Screen modes.

mp3, ogg, and wav audio formats are supported.
A sound will take time to load if playing it for the first time.
- Known Bug: On 3DS, if a sound has to load while other sounds are playing, all sounds will stop playing until the sound is loaded.
If you play any sound from the "Stage," the sound will play as a "Streamed Sound," and will not need to load.
Only one "Streamed Sound" can be playing at a time, so this is good for things like background music.
Sounds may fail to load on 3DS if the file size of the song is too high, or if there's too many sounds loaded at once.

When using a modded Scratch client like Turbowarp, you can enable the 60 FPS (Custom FPS) advanced option, and change the FPS to any value.

The Username block returns the 3DS's nickname, and the Wii U's current Mii name.
The Touching __? block uses simpler box collision, which may lead to projects working incorrectly.
The Stop 'All' block brings you back to the Homebrew menu.

As this is in a very W.I.P state, you will encounter many bugs, crashes, and things that will just not work.

List of known limitations:

There is no vector/svg sprite rendering. Images will only render if converted to bitmap beforehand, otherwise the sprite will show as a black square
Images will only work if it's in .png or .jpg format
Extensions (eg: pen and music extensions) are not yet supported
Some blocks may lead to crashing/unintended behavior (please open an issue if you know a block that's causing problems)
[Wii U] The first controller connected will be the only one that will work
[3DS] Performace is poor when lots of blocks are running at once
[3DS] If you have a bunch of large images, some may not load
[3DS] Images cannot be over 1024x1024 in resolution
[3DS] Some images may appear 'fuzzy' looking or have noticable inconsistencies