Clearly the same reduction technique has been used on all other recent submissions too.
it would be 5 since i would use transp. but i tried with less colors but i just did not like the way it was.
The scanline dithering looks nice. Maybe you could have done it with smaller palette. 4 should have been enough for that linear gradient.
http://i.imgur.com/1ZG8HZe.jpg
http://i.imgur.com/LRrTA7A.png here it is with solid background
- Big shout outs to Helm for giving me the insperation for the scan lines
http://pixelation.org/index.php?topic=21018.msg178842#msg178842