Really liking the minimalism, and the experimenting involved in learning a puzzle. As mentioned already, one of the things that kept tripping me up was the physics. Also, it's not really clear what the exit/finish point is.
Hey! Thanks for the feedback!
About the physics, I will fix the character movement now that the rating week ended.
About the finishing point, it was kind of intentional. One of my goals was to try to see how clear I could communicate goals without text and with reaaally subtle hints. For example, the 'destination_door' (as it's called in my code, haha), appears with a different delay that the rest of the elements of the level, and its sound effects has a different pitch. Not only the feedback was different, but the level design is arranged in an incremental way, so it should be pretty clear which door is the destination in every level.
I'm sorry for the wall of text, but I wanted to elaborate in the subject.
Thanks again for the feedback!