cool concept. there was a bug the first time: killed first wave boss without dying. Died phase 2. Picked new guy. Never saw ghost. I cleared the save and the second try without reloading page I got the ghost but only if i died before the first phase? Also phase 2 invisible almost invis boxes were not fair in that fight. should add a visual sprite for those projectile spinning things
besides that this was a cool mechanic. I wished the players honestly helped kill the boss little dmg. but maybe like a funny quip where if the boss killed htem they dropped like xp for the lvl up. but like replayed the entire fight they did. Maybe record teh coordinates this way. Kinda allows for speedy runs or something idk. I like the mechanic overall though and the music was great.