Here's something I made from an idea I had. I think it turned out pretty nicely for what it is. Control the cat with WASD. Click the cat to toggle the pen. Click the background to toggle the grid.
Everything was made by me except for the Scratch Cat. Changelog- v0.1 - Release v0.15 - Made the cat move slower diagonally - Gave the pen depth - Altered the background - Made the horizon lower v0.2 - Added the option to toggle a grid - Added a dot under the cat to show where the pen is