from roxfox64:

This app is a Lua coded MSPaint clone.

Here is a quick controls guide:

[Controls]

After you load RoxPaint! in lowser here is what you can do:
Analog = Move cursor
D-Pad = Resize screen
Cross = Select
Circle = De-select

To resize the canvas:
Press cross on the Resize button
Use the D-Pad to change the size.
There is a counter on the right of the resize button that will tell you your current resolution at all times.
To stop using the resizer press circle.
You cannot go past 480x220 in this version.

To Save your picture:
Move the cursor to the save button, and press cross.
It saves to ms0:/psp/photo

As this is STUC(STill Under Construction) it is NOT a standalone Lua App, so you need to download a copy of LuaPlayer.
It can be obtained at http://luaplayer.org.