I really like the focus twist in this - gives it a good mix of puzzle and reflex skill requirements. The gold/silver/bronze awards provides a nice gameplay loop that encourages replay.
I did find it quite hard generally to play with a keyboard due to feeling like I was either going too slowly or too quickly, and would sometimes get stuck on corners - I'm not sure if it has controller support but analogue joystick control feels like it would really elevate this.
Great work!