Audio
- Added two new music tracks by BabySneed

Content
- Added level 7 (Agartha)
- Added grenade launcher weapon
- Added weapon menu in the bottom left of the screen

Gameplay
- Added a global alive enemy cap of 2048.
- Fixed the spawn-director interval ramp so it now clamps at the intended end interval instead of continuing to shrink past it
- Lowered early-level base enemy pressure substantially and retuned Levels 5-7 to stay harder than Levels 1-4 without front-loading the difficulty
- Added a per-update spawn burst cap so hitching or recovery from low enemy counts no longer dumps an oversized wave at once
- Improved ranged enemy behavior in geometry-heavy levels so blocked line of sight no longer causes indefinite stalling
- Updated hunt behavior so enemies track the player position instead of drifting harmlessly toward arena center
- Raised opening enemy pressure slightly across all singleplayer levels by increasing base alive counts and reducing the initial spawn interval while keeping the later scaling curve intact

Achievements
- Added new achievements for level 7