Not bad, but could go further. I thought the character moved a little too slowly (I got that "slowdown" glitch every once in a while too), and some parts of the game felt a bit repetitive. Having some upgrades might help, or maybe some weapons. Just a bit more of an obstacle than a maze and a few easy-to-dodge hazards. The ending, while interesting, was a bit disappointing. I also have no idea what that one heart did that I grabbed out of mid-air.