These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Game Breaker: The S-type option, which targets enemies. It's possible in several segments to rely solely on S options to do your bidding, earning points for not firing the main weapon and using your main weapon strictly for Smart Bombs. In fact, it's so broken that in Score Attack and Time Attack, the game refuses to drop an S powerup.
Hilarious in Hindsight: The S?GA-and-Nint?ndoTake ThatEaster Egg is a two-for-one deal: This was back in a time when SEGA and Nintendo were bitter enemies rather than the former happily producing games for the latter's platforms, and the game has since been given Nintendo's blessing to be officially released on 3DS Virtual Console.