Very nice art, and the writing is right up my alley. Also, I love the back dash, feels like an original (at least to my, admittedly limited knowledge) twist on a common mechanic that had more of an affect on how I played than I originally thought it would. It could obviously use some sounds and polish, but I think you have the makings of a super cool mechanic there!
Not sure if this was an issue on my end (I do everything from an almost six year old Chromebook that's more of a tablet than a laptop, so I tend to assume everything is an issue on my end), but the game seemed very slow. I didn't let it really affect my rating, just in case it's on my end, but I thought I'd let you know just in case it's something you want to look into if you're going to expand.
Overall, however, this is pretty awesome! Great work!