Thank you very much for the compliment & for playing! :)
- The A and B connections are done sequentially in cases where the A connection doesn't lead further down; so Start -> Move -> End would do the same as Start A-> Move, B-> End; it's effectively just an option for preference (and a way to make the conditional blocks and nonconditional blocks be more similar).
- "Do nothing" is similarly not a necessary thing but way to e.g. stagger actions or organize your code if you so prefer.