Added a title screen and polished some of the transitions

The title screen really helps tie the game together, and makes it feel much more like a real game. I found two fonts on Itch to use for my game—Chonkly and 3x3 Mono. Both are CC0, and I’ve yet to use 3x3 Mono, but I might use it for smaller text later.

The transition between levels and when you die and the level resets both looked pretty bad, flashing a gray screen and looking quite jittery. I hunted around a bit for the source of the problem, and eventually discovered that it was due to my camera’s position smoothing. I fixed this by calling reset_smoothing() in the relevant places.

All in all, this really made the game feel more complete, and I’m really happy with where it’s going. In the future, I need to add more levels and the mechanics that go with those. If I have a large number of levels, I may also need a level select menu.