Cute and relaxing experiential game. I don't really understand hypnosis, and I don't think it'd work on me even if I did, so I can't vouch for its hypnotic efficacy, but the deep breathing and imagination sections did a good job of melting away my stress and putting me in an inflatable orca mindset. I started noticing how the subliminal messages work part way through, and I can confirm that the game is true to its word and is only trying to provide positive and fun messages and isn't trying to screw with your mind. I am slightly concerned about the concept of achieving euphoria through self-suggestion, since I've read that can make some people experience emotional instability and alternating periods of euphoria and despair as their body tries to balance its neurotransmitters (look up "dark night of the soul" in the context of meditation). I doubt that can happen from a fun little game though; usually people have to practice intense meditation for months or years to reach that state.
In summary, it's a well made little thing, and I'm glad I played it.