Well, it seems like there is a potential there for an interesting Tetris variant, but the lack of time you mentioned shows through. Right now, I’m not sure what value the flip adds — the gameplay stays essentially the same. On the technical side, the ghost pieces should be made much more subtle, I think. I was initially confused by what they were, and then found them distracting. Contrary to what you said, it doesn’t look “bad” at all — just not finished, which is totally understandable.