I was able to make it past the level 3 bug. 90% of the game play so far revolves around your garden.
I like their system for hiring friends to water your garden and then feeding them to keep them there longer.
Leveling up to 8 was pretty quick and rewarding. Plants seem to grow pretty quick, and the ones I planted yesterday were still there waiting for me to harvest when I got back to it today.
If you feed a friend you can keep them watering your plants for a long stretch of time.