What an intriguing idea! I'm glad the tutorial was below the game or I'd have had no idea what I was doing, but this is pretty interesting. I don't think I quite get the idea of price fluctuations, though; if I go away to make a cup of tea, do the prices change? Or do they only alter when I do things, like a stock market version of Superhot? Nonetheless, this is fascinating, and quite different from most other games; bonus points for idea creation here, and the pixel art editor is well-done and easy to understand.