Snapshot 8: Unlocks and arena overhaul

Feedback:

• A popup now lets the player know when a new item has been unlocked.

Gameplay updates:

• Bombling and shield now have to be unlocked.
• A bunch of new assets to spruce up the environment has been added.
• The arena has a new overhaul, and has a new environmental hazard to take into account.

Audio:

• A new music track for combat has been added.

Performance:

• Lighting and shadows have been tweaked and should improve FPS by roughly 20-30%.
• An option to disable Lumen has been added, this option gives the game's lighting a vastly different look, but could improve your perfomance by 100-300% depending on your system.

Fixes:

• The game no longer crashes the first time a save is made.
• The UX for shields now updates properly with resolution changes and no longer disappears when entering and exiting menus at unexpected times.
• The shield now properly follows the player when freefalling.
• Secret scrap pickups no longer get tallied for the item tracker.
• A bug where the player would respawn slightly lower than the original position, causing them to not be able to shoot over fences and have a slightly harder time to hit enemies, has been fixed.
• You no longer have to restart the game to make use of unlocks.
• A bug where a wave could start in the new game if you used the restart button has been fixed.