|I only managed to find 13/25 of the retro stages without a guide.. no idea where the others are|
... okay now I'm pretty much 100% done everything on hard mode. I found the rest of the retro stages on my own after using a guide to see which levels they're in (except for one of them where you had to jump over the checkpoint to make it show up). none of these retro stages are very hard at all. The final world was intense, but actually a bit too hard to the point where I got burnt out on it.
so yeah, I'll probably eventually 100% the game on the other 2 difficulties, when I feel like playing something chill and relaxing. maybe I'll go for 100% Perfect+ on every difficulty too (there's like 20 stages on hard that I didn't get Perfect+ on).. but that's not priority
played for a total of 5 hours