This is the project code as of the eighteenth day of Devember.

Input is cleaner, and the capsules drop on their own now. Some more debugging
code is needed to slow or stop the speed of drops entirely, so that we can set
up and test for scoring and combos and stuff.

Also, the current code for the down key drops the capsule right to the bottom,
but it would be nice if this just sped up the drop speed, so that you can
advance forward without going all the way to the bottom in one hit. Perhaps by
temporarily forcing the drop speed to be a particular (small) value while the
key is pressed?