The introduction of new shapes for the pieces and bags is well done, the difficult scaling is on point. I also think the vibe and aesthetic is super consistent and charming, and I enjoy how the bags concepts change as you progress.
I wasn't a huge fan of the grid disappearing. It felt like a minor inconvenience since I could just hover my mouse over it, as opposed to an actual obstacle or new challenge to overcome. I think conceptually it could work though, with some tuning.
Really great entry and take on the concept overall though, could definitely see this fleshed out into a full game.