The fest is over but I am going to give some feedback anyhow. I just got to try your game and the control is very tight, the platforming aspect is good and the controller experience is good too. The challenge level of the game seems good to me so far, the risk and reward is pretty well balanced to encourage me to keep trying. 

What I would like to see tweaked is adding sound options, some of the sound layers (like bgm) I would like to turn it down but can't find the option on the demo, (maybe its on the finished game) I also noticed there's an update on the art on the steam page so the demo seems like an older version of the game as well. 

Overall a very classical take on the game, one immediately problem I noticed was that I didn't know what was an "item" for the character boost and weapon for the game, the lamp felt too closely like a part of the background, it may need a bit of glow outside the frame of the lamp itself to communicate to me that it's not part of the background I should ignore. My chat on the stream also could not tell until later. It's something that needs to be communicated to the player really quickly.  

Another major disadvantage to your game is the ninja character does not standout on a screenshot or a play through easily, you may want to assign to the player character it's own light source and make sure he will stand out on all environment screenshot clearly ever so subtly, it will help sell your game easier. 

Just made my let’s play on your game as a regular player (so it’s without voice comments). I hope it will be useful for you to see how fresh players started your game for the first time :) I’ll provide text comments later, probably after finishing the videos for other projects :)