According to the official website, [tHug] the graphics artist of the Giana’s Return team is missing in action and couldn’t be contacted. Now they are looking for a new artist.
Here is the quote from the official website:
[tHug] our current graphic arist seems to be extra busy or has disappeared, at least he does not appear online nor does he reply on emails– as we want to get things done, we are looking for someone to help out again.
Please don’t offer your help unless you know what it means to work on a large project. You need to be a skilled 2D pixel graphic artist, dealing with limitations suchs as colors and tile sizes.
Giana’s Return is freeware, so there is no money involved, therefor we can also not pay you anything.
Source:gianas-return.de