I setup the game following the instructions on WIndows, but I'm still not sure how to play... I installed LoopMIDI and added a port "OZONE", increased my Mic volume, but still unsure whether I should play with my voice or by pressing the button indicated in Odysseus/Ozone. Only the keyboard keys seem to affect the boat's trajectory, by showing colored effects. I managed to go past 3-4 bubbles by playing with colors, then got lost and respawned.
After reading the instructions I had the impression I would hear particular sounds related to colors and would have to reproduce them with either the keyboard or my voice with the correct pitch, but I always hear the same BGM... Only space will trigger an echo, but the sound doesn't change based on the color sphere I am in.
This game seems to have a hidden potential in terms of controls, but I can't unleash it... Do you have extra instructions somewhere?