Very nice entry, I had lots of fun with this one...
The map was great could really feel it opening up with each new ability, and the game looked great, I'm not sure the jewel mechanic added that much for me (but it didn't detract much either as it never felt like you were struggling to pay the cost of the "jewel" gates. The wall jump felt a tiny bit janky as has been mentioned elsewhere and the walk cycle animation was slightly strange... (but in a very charming way that I grew to love)
Possibly the most distracting thing (for me) was the slightly apologetic text where you got the last ability and then again in the last room - There was certainly no reason to be so apologetic given how well rounded the game is, it could have been replaced easily with text that made you feel more like you (as a player) had triumphed getting to the game, and that you as a developer had triumphed (by delivering such a well rounded game)
Great job.