Hi there. Hope you are doing good. I have googled "spank the monkey" game, its a board game and some sites have another arcade type game. can you kindly tell exactly which one are you looking to get done? I have a team of unity 3D game developers/ designers and web developers we can surely build you a quality game for both android and ios. I am unity 3D developer myself aswell.
Please initiate chat to discuss more details and see my portfolio. Final quote would be given once requirements are clear.
Regards,
Asad