it looks grate, $15 seems to be the average, I would buy it at that.
you have it on the list but being able to change the colour of the grass would be very handy and very robust
- E.G different colour greens, browns and so on, without it looking bad
having the player leave a trail/ foot prints of a length of time in the grass to show where the player has been, that would set you apart from all the other pack out there, but harder to do