I found the game quite entertaining and challenging as well as the music complimentary. Also, as Sameezy said, the lack of jump (as well of the lack of ability to fall off ledges) was annoying at first, but it added to the game's challenge and fun. However, I have three pet peeves that I would like to mention in chronological order. First off is the starting keys. Once I click play, the game does not register that I am playing it, so I need to click again in order to use any keys to move. I think that your players will feel more at ease from the get go if you can just click play and move, without having to click on the game again. Secondly would be the music. In case of outside interruptions, once you start the game, it would be nice to be able to toggle the music on and off. Lastly, and I realize this is just a pet peeve and not really important to the gameplay, I find that it's annoying that Bitboy and the monsters can go between the stone door blocking the entrance and the door. I find myself questioning the logic of this many times as in real life, if I could pass between a locked door and the threshold it's guarding, I wouldn't run around trying to find keys in order to go through the threshold. But as I said, it is an awesome game and I look forward to playing your full game