Uhhh just a test for a huge WIP game Arrows/WASD to move do Space to "Place" dot "E" to erase all The code is designed to be anti key-hold meaning if you hold any of the action keys it will still only move ONCE until the key is released and pushed down again.
Thanks to @CompassTravelCompany / https://scratch.mit.edu/projects/1294795022 for the idea of using a scratch backdrop.