IFGF GISI Auckland 4th year Anniversary Cake

Last Sunday I made a cake for my friend's church anniversary and here is the cake.
The colour theme is to match the invitation. But I have made it simpler with few less colour.
Overall I'm happy with the cake design, just one thing that bothered me is the number 4. I think I could have made it better. They were very happy with the cake and that made me happy too :)