Pool Tycoon 4! Currently in Public Alpha so a lot isn't finished/glitchy yet...
Feel free to send feedback through the form of a message!
TO SAVE MORE THAN ONE POOL: Reset your pool (Pool Properties -> Reset Pool), then save that pool without first loading another pool. Saving without having a pool loaded will save it as a new one (up to a maximum of 100 pools)!
To rotate items press R or click that button in the right-bottom corner of your screen.