Spiritus Astrum [P0-B14]: p1666: Towards Early Access

I have added the ability to fire guided missiles from the rocket launcher.

Left click fires a standard unguided missile, right click now fires a slower missile that can be guided using the WASD keys. It has a camera mounted on board that can be viewed using a screen on the launcher, and the missile can also be manually detonated by right clicking again.

The video below shows off this new feature.

I have also made some minor improvements to the game, and fixed a few minor issues.