Add character assets (sprites/videos) and sound effects for Aiko, Blackwind,
DV-8-2303, Kage, Nadia, Nicole, and Steve.
Power overhauls:
- Extreme Ball: lasts 2 shots, cascade splits into 4 balls on 2nd bounces
- Cannonball: adds Space Blast-style explosion on green peg trigger
- Beam Up: retargets to a clear-path orange peg on return
- Overclock: lasts 2 shots, grants free ball every 6 pegs, pitch-rising hum
- Laser Sweep: follow-up sweep on random orange peg after 1s delay
- Shadow Slash: follow-up slash on random orange peg after 1s delay
- Cosmic Bloom: adds small Space Blast around green peg
- Rewind: glitch effect, portal opens targeting clear orange peg, refunds on drain
Add visual effects (shockwave rings, portal animation, glitch bars, split
particles), happy reaction dedup per ball, and comprehensive verification
tests for all new mechanics.
