Completed on normal, got to the final boss on hard and still don't know how to open this door in the basement.
Hopefully not by 100%ing the yellow orbs!
Oddwarg, I love your games ever since EHF, but I want to put your balls in a meat grinder for how evil is your code for the behavior of those flying snitches. They check if you're cutting them off, they detect you from way too far away, they turn around instantly, and they SPEED UP when approached, and OF COURSE they are making the most annoying sound in the world the entire time they are around - I was only able to catch any of them with sound turned off, because otherwise it's literally torture.
I collected several of these flying self-inflicted torture devices, each taking WAY TOO LONG, and gave up on the rest, it's just not worth it to hunt them down with how ridiculously annoying it is.