This is one of the better entries I've played so far. Good work! The design is cohesive and the animations are well done and there are a lot of nice added details.
A few suggestions:
I think the level design could be improved, especially the lower section with the giant insta-death pit. That part wasn't particularly enjoyable, as I couldn't always tell whether I could make a jump or not and ended up dead and having to restart.
The camera could be tweaked: it seems like it moves exactly with the jump, which is very fast and kind of jarring.
It also took me a while to figure out the ctrl-dash thing. Using it with jump was not intuitive for me.
I ran into a couple weird things when fighting the boss. After dying, it took a really long time to reload the save. Windows thought the program had gone unresponsive. Also, in one attempt, my controls locked up and the player drifted to the left side of the room.
Criticisms aside, however, this is a great entry and I'm glad I tested it. Well done.