AspectPaint

If you want to exit the paint app, press CTRL+C

Update

Multi-Color Update! You can now paint in a huge selection 7 colors! Press the numbers 1-7 to select one of these colors!

1. Red
2. Green
3. Yellow
4. Blue
5. Pink
6. Light Blue
7. White

You can also use the Up and Down arrows to change the size of the brush!

And I'm pretty sure the program actually works for Linux now...

In the video, ignore the error at the end. I fixed it after I recorded this.

devenv_KauEvej8Mo.mp4