I'm not sure if it's broken, but on restart the game stops working (no spawning points, locks player movement with nothing happening). I need to reload the page to retry.
I like the idea of conserving energy and only doing the movements you need to. When you pick a direction you got to stick to it, kind of like how Super Hexagon works. I'm not sure if I managed to see all of it as it was hard to tell if the game had broken or not, there were sections of 5-10 seconds of nothing happening but you still get your vertical/horizontal movement locked without a text on screen saying so.