For me, this game was immensely fun in the first 5 hours I played it.
1. Awesome plant seed mechanic that supercharge your plant.
2. You can spend it on DPS OR on sunflower that gives you massive gold early = massive snowballing economy later. Interesting choices (actually getting more sun is 10x better).
3. Awesome endless level arena.
But then I stopped lot of the urge to play today because...
1. Game is just too easy, even all the way to Act III. As long as you do seed on sunflower asap + maintain about 5-8 double sunflowers, it's too easy.
2. After playing endless level arena which is VERY fun (I'm at level 15 now, insane), the regular 'adventure' levels became very very disappointingly easy.
3. The earning extra star repeat levels were still fun early. But now they're just tedious, repetitive, and gotten easy.
I see people getting to level 20, even 30+ on endless arena. That's INSANE. That's the only challenge I have left now.
I have about 25,000 coins that I earned naturally. I still feel like using it is cheating.