I did not expect to like this one as much as I did!! I wasn't sure what to expect given the minimalistic art style and the fact that this is your first ever submission, but WOW...I love pretty much every part of this. There is a surprising level of polish on display here. I was particularly impressed when it came to the tutorial - with typical jam submissions, you're lucky to get button prompts included on the main menu. The tutorial here would not be out of place in a commercially available product.
The art style and VFX in general are superb and fit the gameplay very well. I really like the touch of the "dash indicator" being constrained to the maximum dash distance, which allowed me to easily gauge where I would end up regardless of whether my mouse was placed outside the movement radius or not. The music is a highlight as well (especially how it continues across runs; this is a great way to keep the player in flow). Not to mention how simple yet fun the core gameplay loop is as well...suffice it to say, I had a great time with this one, and I hope to see it further developed after the jam is over (that is, if you're still interested). Outstanding work!!