A nice little technical demo and a great start, the game fits the theme well (similar to my own 2d platformer).
For the most part the movement feels good, just could do with better implementation (the dash feels slow and short, and the wallrunning angle is opposite) and I like the design of the first level.
Some great ideas and principles here, definitely reccomend taking some time at the end of the jam for polishing and you'll be in a great place.