The last day: Polish and sounds
Today, I polished up the game a little bit. I cleaned up the code, cleaned up my assets, and tweaked the physics a little.
Them I added sounds that I got from the free asset site Kenney. These include a little song that plays at the start screen, a jump sound, a bullet sound, a sound that plays when you pick up a ruby, and a sound that plays when you advance to the next level.

Now, I am officially done with PyWeek 30. It was a good 4 days, and I'll try not to miss the announcement again next time. (lol)
So long, PyWeekers!