This is the best theme hook I've seen in the whole jam. "Chase your high score" turned literally into "chase yourself", with your previous run coming back as a ghost repeating your exact route and stealing the crystals before you get there. That's genuinely clever.
The minimalist look works: dark blue grid, glowing cyan crystal, monospaced font, a sort of elegant retro terminal. The HUD is exemplary, SCORE / CRYSTALS / TIME on top and GHOST plus the DASH READY bar and a control reminder at the bottom. Everything you need, nothing extra. The dash with a visible cooldown adds a nice tactical layer to something this simple, and the movement is precise. My first run gave me 100 points and 1 crystal, then the end screen said FIRST GHOST RECORDED with the score 100 to 0, which was a great moment.
Then the problem: I could not play a second run. The screen says PRESS ENTER OR R TO RUN AGAIN and neither Enter nor R did anything. I clicked the screen, clicked the button, nothing. Only reloading the page worked, and then the ghost is gone.
So I never got to experience the actual core of the game, racing my own ghost. That's the one bug that really needs fixing, because everything else is already in place. Also, 22 seconds is a tight timer while you're still learning the map. Fix the restart and this jumps way up my list.