User blog comment:Fatjimmy/life/@comment-24808310-20140512005023

One, i'd recommend renaming it. Two, make it on the DS itsself. 3. Mouse/Trackpag support is relatively easy

Here is some example code

SPSET 0,254,2,0,0,0 @LOOP SPOFS 0,TCHX,TCHY IF BTRIG AND CLICK BUTTON THEN @CLICK GOTO @LOOP

This will make it so wherever the user drags the touchscreen, the cursor on the top screen will follow.

As a long time Ubuntu user, i'd try something different. Make a completely original os. Ubuntu isn't easy to make especially on something as limited as Petit Computer.