I only now found out about this program :O
Indeed it is very nice, but i do have some issues with the interface:
-There should be more keyboard shortcuts, first and foremost for switching the tools (draw, line, box, brush, etc) and to go to next/previous color in the palette.
-The app window is always on top, which forces you to minimize it when you want to access something else.
-Press escape for instant quit. This is not really productive
Also, the program can get quite buggy after I use it for a while. These are some that I've noticed that can appear. I cannot reproduce them every time, but here they are none the less:
-Image thumbnails seem to lag one action behind. If I say fill and image with red, I will not see the update on the thumbnail until I do something else with the image.
-When resizing window, the interface gets cropped, so you can't see the top part of it, for example. I think I was using OpenGL when this happened.
-When using full-screen mode, if I switch to another application, when I get back to D-Pixel, the screen is blank
It's very refreshing to see a program with a modern look and a somewhat unique philosophy.
Keep up the great work.