Thank you everyone for the excellent feedback on the GOG 5 for $10 deal.
So I ended up purchasing To the Moon, UpLink (to satisfy my fantasy of becoming a hacker after watching the movie Hackers when I was a teen), Torchlight, GenForge 1-5 and Alan Wake's American Nightmare.
Many of you recommended Trine, which I failed to mention I already purchased on Steam with its last sale. And after reading reviews on Spacehem - I was in fear of not understanding the game, especially being a noob PC gamer.
Good choices. I was actually pleasantly surprised by Uplink, it's really a lot of fun, and it definitely captures that movie hacker feel.