Press the key Space Bar to turn it to night and see the fish sleep. Press the ket "F" to feed the fish. (Press keys to find a secret (glitchy fish)). Press they key "Q" to become a fish too. Click the bubbles to make it classic mode. In classic mode the fish might twitch a bit.
weatherdwag just remixed it and edited it so I DIDN'T do it that much so, thanks to weatherdwag!