Hello, first of all, please ensure that you are placing the piece close enough from it's intended spot, and that it is the right spot, I would advise to try out the game in the easiest mode of difficulty (which tells you precisely the spot for each piece) in order to ensure this is not a user mistake.
Also, may I know if you are using the default mode, where you need to click and release the piece to grab it, then click and release again to place it, or if you are using the drag&drop option in the settings?
We are available on discord, and I invite you to contact us in order to see if we can solve your issue, and to setup a refund if we can't.
Edit : This bug has been solved in the latest version.
https://infosec.exchange/@rotopenguin/111314227701667812
Here I am trying easy mode on the Desktop, with OBS recording. Both with drag and clicky/clicky modes. It works the same with Game Mode, Fullscreen or Windowed or FS(w) modes.
Thank you for your feedback. This is clearly a bug, but we are unable to reproduce it, it seems to be a problem tied to something in your setup.
If you wish, you can ask us directly for a refund here, which we will forward to itch.io immediately.
Otherwise, I invite you to delve into it further if you are willing to contact us through discord so that we can figure out what in your setup is causing this issue, and to help us improve the game.
Edit : This bug has been solved in the latest version.