Systems Demo Patch - Alpha 1.1.1

Given that this is just a patch for some of the bugs that have surfaced, I don't feel a need to post it all over social media, but I'll still make a devlog for it.

Changelog:

• Fixed a bug where the truck would trigger its crash explosion and sound effect for many frames in a row.
• Fixed a bug where you could become invulnerable if you took damage or crashed right before reaching the end of a planet.
• Fixed a bug where you could keep controlling the truck in an invisible and collisionless state after crashing.

There's still a few more bugs to iron out, which I plan to address in the next patch.