Your real walls are cracking open. Glitch-bugs pour out of neon rifts, crawl across your room, then leap at your face. Shoot the rifts shut before the room is overrun.
Trigger / pinch: fire energy bolts
Bolts ricochet once off your real walls and floor
Bugs crawl along the actual wall surfaces
Endless waves: every 5th rift is a BOSS. Shoot or touch glowing orbs for power-ups