Post jam version 0.1!

First version after the jam! Main change: better audio system! full changelist below

• major audio system rework (smooth audio!)
• one new boss
• one new enemy type, attracts chain
• one new music track
• tweaked spawn visuals
• slightly buffed hexagon, as well as making it untargetable by chain to keep it consistent
• made level 4 slightly easier
• revamped level 5 with new boss
• adjusted music thresholds on various levels
• wave announcements now display wave number