This is a Bitsy game, which uses two-color-palette minimalist pixel art and arrow controls to create a world to navigate, and text pops up when you run into certain interactive parts.
The story is a poetic description of the impact whales have on marine life both while they live and after they die. Its fairly brief, and the whole thing hinges on the writing being good, which it really is.
The artwork pushes Bitsy to its limits, with majestic whales, beating hearts, deep sea life, dithered gradients, and more. The music fits the game quite well.
Not too long, but enjoyable.