You guys managed to get the big things in -- the towers and upgrades, the enemies locked to a path, the multiple levels -- and it's incredibly impressive. What's still missing are the finer details necessary to make a tower defense game more "playable". Being able to learn about a tower BEFORE buying it, getting stats on which towers are doing the most work, etc. Most of this isn't stuff you could've done with the time you had of course, but if you ever were to try again, this is what I'd want to see.