mecheng_analyst, If you go to the upgrade tab and click the two on the right side of that page, purchasing "Smith" gives more items in the shop at once. Also, only the first 4 classes (Starting ones.) have medals for them. Another thing, it isn't day, it's level.
This is one of the best games I've played in quite some time. Thing is, it's so simple. Something so simple is able to grasp your attention so well, that's when you know you've made a great game. It's not long, but it's not short enough to make you go "Wow, that's it?" and the cliffhanger is really good, can't wait to se ehow this turns out. The writing on the wall was a really nice touch as well.