All of my games are available to everyone for free.
However, if you enjoyed any of my games, a couple of bucks to cover website hosting costs and support my ongoing efforts would be gratefully appreciated. I think $2 per game enjoyed is a fair price. Thanks.
Dropbox (250MB Extra space)
Penzu (20% off yearly subscription)
Hole in the Wall Hosting ($10US per year for 300mb space, 30gb bandwidth)

Cheers guys,
Arran, idea 1 is what I was more or less thinking, idea 2 is sort of like what Prometheus is (Except you don't see what your future self will be doing, you can only see your past self)