Woohoo!
For a first game jam I think you did a great job, well done!
I can feel the Mega Man X influence with the dash, I haven't played the other two games mentioned to be able to compare this to them.
The ability to hang in midair is very interesting, I used it at one point to hover a bit above the ground and let the enemies charge into my spoon. :) I think it might work better if the order of execution was Jump -> Double Jump -> Air Hang rather than Jump -> Air Hang -> Double Jump because, since it's a more unique mechanic, players will feel like they got 'stuck' when they first encounter it. But there are definitely advantages to doing it your way, it's more maneuverable for instance, so don't put too much stock into what I'm saying. :D
Sound effects for hitting and defeating enemies would be a definite plus, as it is I can almost 'hear' them explode into dust clouds thanks to the animation.
Spoony's sprite is a bit blurry compared to everything else, you might want to check your importing settings. For pixel art you'll generally want to change the Filter Mode to Point (no filter) for a cleaner, sharper look.
I also noticed that, if I'm standing on top of a ladder I'm not able to jump. Spoony will do the animation but won't actually lift off from where he's standing. I've found ladders pretty tricky in Unity so I can't give a concise way to address this issue, just something to bear in mind for the future.