Thank you for the feedback and kind words! The palette was initially inspired by the red and yellow contrast of a lot of stadium food. Meat and bread, ketchup and mustard, the design on a cola or beer can, etc. Once we settled on a warm green and subtle dark blue for the last two, leaving us with a full RGBY primary color range, it started to resemble a box of abandoned, aged LEGO to me which I kind of leaned into in the audience's designs
As for the engine Timconceivable put this together in GameMaker Studio! From what I was hearing in the Discord GBStudio has a pretty unforgiving limit on how many sprites are allowed onscreen which would have made it very challenging to get the number of people we wanted.