Title screen music and new solo alien attacks

This little update focuses on some bugs.

Title screen improvements:

1. In the title screen now you can see the enemies, and their point scores.
2. The main logo is now color animated, to make it look a bit dynamic. This is why the title text was purple from the start, it was a place holder for the animation.  By having a color that stands out, the shader can replace these pixels dynamically.
3. Also there is music now from the wonderful "Abstraction" (https://tallbeard.itch.io/three-red-hearts-prepare-to-dev)

The main challenge was to hide the music from the normal user, so it would be impossible to download the music, without license information. This is done by wrapping the whole thing into a JSON, that has both music encoded, and a link to the url where the license can be found, and additional a short license description, and the name of the author, and the date when this music was packed into the JSON.

On high level it's simple, on low level, it's a two step asynchronous loading process, where first the json is loaded, and then from the json, the music is loaded.  So I had to update my boot-loader to accommodate for that.  It was all ready able to do it in principle, but only for images, not for sounds.

One thing I am wondering though is, the music is an OGG sound.  How compatible is it with most browsers?  Should I add MP3 support?

Game improvements:

When the aliens get to low, now a single alien breaks off from the formation, and attacks the player.  It happens slowly, so you can manage to shoot the alien, if you are not seeing it too late.

I hope that adds some variety to the game, which otherwise has pretty strict alien moving patterns, since it's a "ode to another well known game from the early days of the arcade".

What do you think, should I have more dynamic alien movements, or keep it close to the original, with strict patterns?