Yes it does. Unfortunately, this is not clear in the reward description. However, the add-on list includes Foragers itself (as additional copies may be added to any level). Once the campaign started, I was unable to change the wording in the reward section. Sorry for the confusion.
If you want additional games above and beyond a particular level, you simply choose a level that you do want and then, using the prices from the add on list, add the additional amount to the pledge. After the campaign ends, Dr. Finn sends out a survey and you will provide him with the information about what games you wanted.
Foragers will likely be manufactured in November or December; so it should be shipped to backers in January of 2016. If you are backing for games other than Foragers, these games will be shipped along with Foragers. However, if you really want other games earlier (since most of them are now available), you'll have an option for early shipping. This will require additional funds to be collected later. The cost of the combos were determined under the assumption that games would ship together. For some special Canadian levels, I am offering free early shipping on available games because I have to get some of those games out of the warehouse quickly--to avoid hefty storage fees.
Don't see the answer to your question? Ask the project creator directly.