Thanks for the feedbacks!
Holding down keys isn't intended to rotate the piece, but I haven't fixed this for now, sorry - It looks like a result of my binding rotate to shift+numpad5, which is the NONE key. For some reason NONE is also coming through on repeat type key events, and I think this has something to do with how I've hacked the underlying engine, LibGDX. It probably requires more time/thought, but also doesn't seem urgent.
The soft lock on the other hand is much more critical and isn't intentional. I've fixed it by extending the activation fields out a bit to the sides, and a new version is available for download. It always sucks when soft-locks happen but at least you were still in the first area!
Thanks for playing!