Halloween Update (Big stuff!)

- Unlockable seed system.
- 100+ New room layouts.
- New Enemies and Hazards: Bats, Giant Skulls, Candles, Ghost Blocks.
- Reworked modifications console UI.
- Held weapons can now be broken on the map screen.
- Secret room is colored differently on the map. Should stick out at a glance.
- Enemies have different weight now. Some might be harder to push than others.
- A way to protect blastcore's happiness and associated achievement.
- A small special reward for what is likely the hardest feat in the game.
- Thunderhead, Runic Gun and Razor made much less visually distracting.
- Halloween candy.
- Extractors now roughly 13% spookier.
- Special thanks to Dectilon for accidentally discovering a shop bug in a stream.
- Small weapon tweaks. Chain lightning less quirky, Runic gun less grating and more visually pleasing.
- Tiny boss tweaks. Firewall easier to hit, Reactor less noisy on death. Armor Tac's arms no longer flash constantly after being destroyed.
- Shop interface improved.
- Other minor fixes.