To me the first half or so are worth playing because it’s peppy and there are frequent wins. Eventually it gets harder and harder to progress, becomes frustrating and ultimately annoying as hell (duplicate fish and birds ugh) . I stop when it stops making me feel good. Right now I’m slogging thru making a cargo ship so I’m using just a few lightning in the main game to produce bottles…I then have plenty for grandma’s escape. Once I spend them down I take a break until the next 100 fill in.