Overall, Void Runner is a solid entry.
The collision gets a bit buggy when running into a wall. As others have stated, the double jump feels too unforgiving, mainly because this is a game jam, and not a lot of people are going to try and become perfectionist for your game. So, easing the difficulty would be nice.
I really liked the spark particle effect that is created when the player lands, and also the platforms lighting up on collision. Pretty cool stuff.