While it would be really cool to have a built in sprite/image editor, we just don't have the resources to incorporate that. And even though inkscape is open source, it's unfortunately not as simple as just including it as part of hyperPad. Right now our focus is purely on the app/game creation side, and leaving the graphic creation to the tools with teams better suited for the task.

We didn't make the artwork so we don't have the vectors. You can view the original artists site here: https://kenney.nl/assets he has the assets downloadable for free (but not modified for hyperPad). I'm not sure if he includes the vectors or not.