Budget Rainbow Cake

Heyy dolls! It was my aunt's birthday and she requested for a rainbow cake. I am on a budget, so here it is:

Rainbow cake with chocolate ganache and topped with m&m's and chocolate wafer sticks on the side!
ignore the SR cake knife, i forgot to include the knife =p

And this is how it looked inside:

i am sorry if it looked messy, practice makes perfect! =)