This was a ton of fun. The simple two button game play is still really satisfying and challenging. It's a bit tricky to plan your moves when you don't know the level layout, but once you do it's fun to try and master the timing.
Scratches a reflex / memorization / rhythm itch that makes it hard to stop playing.
Make a bunch of levels and add a catchy soundtrack and I would spend hours and hours playing this game.