Makka pakka cake

[1dilemma]

I might be mad but I'm wondering whether I can pull off one of these.

I don't usually bake

Anyone have any tips and hints please (I'd like to make it banana flavoured)

Thanks

Jeez, nothing like a challenge. idea, if you pull it off then much kudos . No tips but just good luck.

Stubble thanks for that, I did steal their idea, carrot cake (square) with cream cheese icing coloured green with food colouring. White chocolate buttons for the stepping stones, a marzipan makkapakka, I tried to use coffee to colour the bits on the side of his head (and top) it did change the colour slightly so worked but left them gritty and I expect yukky. However it was hardly a hardship not to eat them!
Number candle on top and all done.

dcs loved it and birthday child could recognise that it was makkapakka so more than good enough for me!