Very nice game but too hard for me.
Some suggestions from my side, right now the dash is affected by the jump direction and after jumping I wanted to dash straight up but I was going diagonal. And since you are using w for dash direction, I think it would also be better for jump as well. Because right now the keys don't feel intuitive and rather restrictive. Also let the player cheat(they shouldn't realize it). You can add coyote time, etc. to make the controls feel even smoother. One last suggestion is make the game jam games slightly easier, because you as a dev can complete your game easily but player might not even be able to enjoy what you have created and they don't have much time to master your game mechanics and then complete it.
Overall Good Job! Keeping making more awesome games. All the Best!!