For this 1st game I'm trying out a bullet hell game. You shoot at enemies while you have to dodge a bunch of bullets that enemies shoot at you. I think, like Slow and Steady (which was also made in 1 week), there will be waves of enemies that you defeat, except instead of having fixed waves I think I'll try random ones (that get harder over time). I get to reuse some code from that tank game that I've all but abandoned, which makes it easier.
2 more details I forgot to mention yesterday. The games I make have to be different from each other, they can't all just be variations of the same genre. This means the other 3 games this month cannot be bullet hell games. Also 4 weeks is 28 days and there are 31 days in the month; this means I'll allow 2 of the games to take 8 days instead of 7, and the 1st game will come out on Dec 8.