I played this game back in the late 90's early 2000's.
Definitely on an older windows system.
This game was kind of like paint, you could draw, paint, etc.
The best part was a Thumb that when you clicked and dragged him around he would laugh and smudge the picture(or your desktop).
You could also drop bombs onto the picture and it would leave an explosion mark and you could drop black bugs onto the picture and they would splatter with yellowish guts.
There were other things you could drop in the picture as well but I can't remember them too well.
If anyone can remember this game it would be so very much appreciated!
Thanks
-Icejumper