Gameduino is sort of a arduino-based DIY games console. I've had the pleasure of providing the boot screen logo for it. I couldn't make up my mind on what color scheme to pick, so here's both of them (click for enlargenage) :
I've decided to share this sheet with pretty much all of the gfx from Cat Astro Phi. Note that everything has been drawn using only 4 colours, to emulate the old Nintendo Gameboy hardware. Black is used as transparent. Click to zoomify, as usual.