Ty again to the anon who suggested Codename engine, it's really good, I just have two hopefully simple questions
1. how to use this! i guess more specifically how would i designate something as an alt animation in the first place, as i can't find it in the character editor.
it'd be nice to use an alt idle, and have a character turn their normal sing notes into miss sprites, but i'm also asking because i want to make a character appear on stage when they weren't there previously, i figure i could just use the alt animation to make them invisible, before making them visible later, but not sure how to do it.
2. simply how to make an image in the background move across the screen and when, is that an event trigger somewhere or a stage editor thing or...

sorry for the dumb questions, but i'd ask rather here than looking through 2 year old youtube videos with kids chewing gum into their earbud microphones.