I liked it. It reminded me of Flappy Bird, except vertical instead of horizontal. The birds were very cute. I do wish there were more platforms along the route because they acted as nice checkpoints so that falling didn't feel so punishing. Falling felt a bit punishing as well because I couldn't see a way to catch myself. Though that might be the unstable part of the game coming into play. I also feel like if you removed the ninja elements it could also work as a sort of "canary in a cole mine" situation. I say that as a compliment by the way. I think it's good when it's the game play that sells a game jam's theme, rather than the art or overall aesthetic.
Viewing post in The Falling Journey jam comments
Thank you very much for the feedback, i was having questions whether the platforms acting as checkpoints were making the jam too easy, so your comment on it really helps proving that its actually not sufficient. and i do agree it's a gameplay that should sell a jams theme, i have been failing at it since start and have to work upon it!