I have finally decided that I have come up with a design that I like (for now).
As all of my drawings of giraffes have been unsuccessful and do not really tie in with my other simplified characters, I have decided to use the two giraffe heads that I already have. This has created quite a symmetrical styled cover which I think is fairly appealing to the eye.
For the background, I tried out many different bright colours including mustard, lime green, orange and pink. Overall, the bright pink worked best for the background as it complimented the blue giraffes best. To add a little interest, I also added a lime green border to the outside to liven the cover up a bit.
Here is my current front cover: