well i started to work on it 3 years ago , and i went with my own concept of what if a oldschool game that i played when i was i kid would looks like now if it was made with a modern technology , it happend that i did in the game gameplay and the mechanics elements similar to "Cuphead" , i wanted to refer to it because of its popularity . shovel knight , simply because placebo is a deep side scroller experience , that changes constantly bouncing between classic 2d elements ( boss fights , mysteries , characters ..etc ) hope u like what i did :) , and appreciate the details and also the references of some well known games i grow up playing such metal gear solid , etc,,,,