Finished the core mechanics.

Yesterday, I finally finished the core mechanics of the game. A simple enough accomplishment, but it sure feels good. I was getting very frustrated for a while. I feel like my big breakthrough came when I stepped back from the grind, cleaned up/refactord the code, and started commenting what I had done. It seems to have made it so much easier to debug and add/change features without breaking something.

From now on I'll just be adding things like the start screen, adjusting the difficulty, cleaning up images that up till now had just been placeholders, etc...