Cool concept here, I love tower defense games. 360 degree defense is a nice idea that I appreciated since I don't usually see that in these types of games. I also thought this was a good implementation of "multiple applications" and the UI was formatted well.
I do agree with others in the comments that there were balancing issues (once I had only bought about 6 turrets, I won without doing much else) but doing full game balancing for tower defense in just a week is extremely difficult so that is understandable.
I would also recommend including descriptions of each defense type within the actual game because sometimes I forgot exactly what they did and scrolling to the game description mid-game was distracting. More tutorial aspects would have been helpful.
Good job overall. If you want to stick with developing this game, I think the potential is there and some small improvements would make a huge difference!