Yeah, that’s definitely possible, and it’s not hard to implement. I might add it in the next update!
Also, sometimes five level 30 bosses aren’t necessarily harder than one level 30 boss. That’s because the difficulty gets split between them, so each boss is actually only level 6.
I’m also thinking about removing this difficulty-sharing system in Boss Mode, so five level 30 bosses would actually mean five full-powered level 30 bosses. But I’m a little worried about performance. My PC might start begging for mercy.
I’m not sure which specific effects you’re referring to. Most of them are made with custom code, using math to calculate shapes, movement, and animations, then drawing everything programmatically. If there’s a particular effect you’re curious about, I’d be happy to explain how it works!