No note editing? No sequencer?

I fumbled around and got a loop going, but some of the notes were off. No problem, just get into the matrix editor and… uh, except you cant edit at the note level? You can see your loop tracks, but you cant actually get in there and drag individual notes around, like every other music-making app? That would mean that this app is only for performers, not people who like to tweak each note to perfection. Since Im not a performer, that would make this app useless to me. Someone tell me Im wrong. Am I missing something? How do I edit looped notes?

scampercom about ThumbJam, v2.4.2