Pretty good platformer. I think the levels are too long for the Super Meatboy style punishment. On level 3 I needed practice figuring out the are with the spike below and above. But getting practice entailed redoing the first part of the level. I'm not a diehard member of your consumer base, so I am not willing to give you this much of my time. I say this, because games like "I want to be the Boshi" and similar assume an existing audience. Within the context of a game jam, you are going to get strangers to play your game. Many of these, like myself, will not want to die 900 times just so that they can solve some puzzle you've put together. In this context, I think you're much better off testing mechanics to see how they are received.
The bubble mechanic is interesting as it works as a weapon and locomotion. I don't like how it disappears unexpectedly on its own, and I don't like its cooldown being so long. It slows down gameplay for no reason that I can see.
The dash mechanic is pretty well done, but only used in level 1. I am of two minds about it being 360 and affected by physics. It's interesting.
Presentation, both audio and video is excellent.
The tutorial plants are annoying. I'm not interested in their banter. Tell me what the buttons do, then vanish forever, thank you. That's my position on that.
I don't think the game hits the theme at all. It might happen later, but I'll never find out, because of the restarts.
Solid entry.