Oh, man, this has been a week of progress. Last week I had nothing to show but a basic test room, after three nights' work. Now, I have a fully-working (bar an audio bug) first level, proper graphics, and music. It's safe to say I'm pretty happy with how things are going.
I will say this, however: This morning I linked the game file to my team at work, and it's an incredible experience to see people laugh and give eachother hints and celebrate when they reach the first alien. Personally, I think the game isn't really up to scratch, but people seem to really enjoy it.
So in the week before I got to stand over someone's shoulder and watch them finish level one, what happened? Well, lots, if you count a complete graphical overhaul and some very funny bugs.