I assume Raptisoft has no control over the Steam version of Chuzzle Deluxe, therefore it can't be updated via Steam. Could you let me know of your computer specifications?
Right; remember, the original Chuzzle was published by Pop-Cap, so it's on Steam alongside the rest of their pre-EA buyout library. It wasn't put up by Raptisoft.
Sometimes older games (or games made on older engines) have issues like these on some modern computers - one of my favorites, Wonderland Adventures: Planet of the Z-Bots, comes to mind (it's made in Blitz3D if I recall correctly, and that causes it to lag a lot on some Windows 10 machines). It's possible Chuzzle Deluxe has become one of those games - and if so, it'll probably be up to fans to figure out a fix. Unfortunately, I wouldn't even know where to start, so... I'm afraid I can't be of much help here.
Comments
Sometimes older games (or games made on older engines) have issues like these on some modern computers - one of my favorites, Wonderland Adventures: Planet of the Z-Bots, comes to mind (it's made in Blitz3D if I recall correctly, and that causes it to lag a lot on some Windows 10 machines). It's possible Chuzzle Deluxe has become one of those games - and if so, it'll probably be up to fans to figure out a fix. Unfortunately, I wouldn't even know where to start, so... I'm afraid I can't be of much help here.