It took me a while to get the hang of the mechanics but once I did it was really fun :)
I had a little bit of feedback. I think the the dash meter should refill when you load a checkpoint. The bullets block the player so if I was moving too fast and shot in a forward direction I would get blocked by my own bullets. The slow moving bullets also make it a bit difficult to hit the boxes unless you use slomo (I loved the slomo, I just think it was too hard to play without it). Great concept overall.