We are having decent theme suggestions (some good, some bad), but then I saw this in the round 3:

Games that shouldn't be in first person done in first person

I just wanted to tell you that I'm going to use a simple 2D Javascript game engine I wrote. I really would not like to spend the rest of this week writing a 3D WebGL engine, just in case (well, I have one already, but it's not very general purpose - I could make it one, but it would still take some time).