It's a great concept, and I love how intuitive it is concept-wise. I found it somewhat frustrating in practice, sometimes from the timer or having to constantly take a hand off the arrow keys to use the mouse, but more than once from my own lack of skill/forethought/ability to adapt. I can totally see the potential, and I definitely don't think it's poorly programmed because I had trouble with it! I think the concept stands strongly on its own, and with some tweaks this would make a fantastic puzzle-time-waster!