I like the dragging mechanic. The only thing id change is when i spawn the grass I'd add a action to set its z order to Player.Zorder-1.  at some point i couldn't see the character for the plants. and I'd  throw some pigs into the earlier levels once i got to the levels with the pigs it became much more fun.

nice without being crazy

Its interesting but very unclear you drag the farmer over the grass and it turns to flowers? you really need instructions for games like this as at first I just thought it was broken as I could not do anything.