Is there a way to turn the system mouse cursor off. I have a sprite I'm using as a custom cursor and the default windows mouse cursor is being drawn over the top and it looks terrible

There is no way to turn off cursor. I got your problem and will think how to do it :)

Likely you will have to set a flag in RAM using 'poke'.

I just have sprite being drawn at the mX and mY returned from mouse(). Which works well except for the problem mentioned. But if we could customize the cursor used in editor, that would be sweet.

you can define mouse cursor sprite (foreground sprite) from LUA by calling poke(0x3FFB,index), it'll draw system cursor if index=0

https://github.com/nesbox/tic.computer/issues/116

done in .24

Nice