Ended up being closer to 55 days (I spent a lot of my early dev time spinning my wheels trying to get things like the zombie behavior to work, and I procrastinated on getting level 4 finished and the sound implemented until right before the voting deadline), but thanks!
I think my next game will probably be less of a hybrid - the TPS stuff ended up a lot clunkier than I was hoping it'd be (even if it gives you a nice view of Miri up close XD)