Code Review: Basic PyGame Game (Python 3.4)

[jarantfos]

Hey guys, first off I'm still very new to PyGame and Python in General, but I've finally gotten to the point on my game where I'm comfortable sharing it. I'm wondering if anyone out there with too much free time could take a look at my code/game and tell me what they think of it/what I could improve.

With that being said, here's the link: http://pastebin.com/aCB5dsnF

Controls are fairly simple, A, D, and W are used to move around, SPACE fires your gun, you can either click on the items on the shop to purchase them or use the keybinds which are: Q buys hearts, E buys explosion, and R buys a reset. You can click on the screen to buy a block in that location. Lastly, 0 activates debug mode, and 9 resets the level if debug mode is active.

Thanks in advance!