This was so incredibly fun, and stressful. Figuring that you could use the 1-6 keys helped a lot, but level 7 felt like it had a weird difficulty spike, and I think that's because the npcs were all mixed up (so 1, 4 and 6, I think were on the left, and 2, 3 and 5 on the right?), so it was harder to actually select the ones you wanted.