Played browser version, which has a popup that says "IN THE BROWSER VERSION SHADOWS ARE REMOVED."

This popup needs to also say "SAVING IS DISABLED IN THE BROWSER VERSION", because I didn't read the note under the game saying this, and as a result expected my progress to be saved, closed and left, then it was gone when I came back.

That was my main frustration here and what drove me away from trying it further, but that's not why I scored it how I did. I did beat the first stage, and the gameplay itself is just not enjoyable enough (wasn't fun to play or control, got hit when I wasn't expecting to, etc) and the upgrades are not compelling enough..

This type of node upgrade game usually has pretty low requirements for me to enjoy them, because I like the format itself, but this one just doesn't get there for me.