Nothing to the left, no. I plan to add a story mode with a tutorial. You’ll be in contact with the rescue ship and the dialog will contain pointers, both early on and later when you encounter some new mechanics or have trouble with some big jumps. Thanks for the kind words!
Thanks! There is no sound at the moment, but I plan to add it. The level design is actually derived from the notes of Clair de Lune by Debussy (an easter egg moonshot interpretation) and I intend to add some ambient synth music based on the nearby notes. It's all coming, just wasn't able to find the time before the jam ended.
The game does get difficult. I also plan to add a story mode which will introduce you to a bouncing technique. You get bobbing in the water and hit the thrusters when you're as high in the air as you can get. Allows you to dive much deeper and makes progressing easier. Thank you very much for the feedback!
