I thought about this and it came to my mind that since the game looks so similar to Pac-Man, players would also expect it to play like Pac-Man. So I felt like an option should be there. Mode A feels more fluent when turning corners as a result, whereas Mode B still makes it easier to ambush the ghost by camping next to a power pellet. As a result of this change, the game now saves 8 high scores, 4 for each ending multiplied by two modes.
New: There is only one key and its spawn position is now randomized. After repeated test plays I inevitably came to know where things are by heart, and I realized that I placed the keys too close to the exits, making 70% of the play field pointless to visit in any given run. Sure, I didn't want to make the game too hard, but maybe this was made too easy. Although there's only so many rooms to explore, I think this can still be a tad frustrating so here are the room coordinates where the key can spawn.
(5,1), (2,1), (6,1), (3,2)
Fix: The door bug is now fixed. After a bit of fiddling I gave up and decided to hard-code door coordinates, so all four doors open when there's no pellet and Paku-paku has a key.