Lanky-ass Sea Cucumbers

Just a Snake clone made for my C++ module in my first year of university. Its basically Snake but underwater and with long ass sea cucumbers, which is a very cool idea I think. A bunch of funky sea cucumbers are in a leaky water tank and are fighting to the death in a ferocious battle royale. Eat food to grow and dominate as much space as possible. Different food colours give the cucumbers different amounts of nutrition (see chart for reference), but when they consume food thats the same colour ...