- Crowning Music of Awesome: As always with Sunsoft games, the soundtrack is fantastic.
- Cult Classic: It's considered a well constructed, but criminally overlooked Metroid Vania for the NES.
- Nausea Fuel: You see those white ropes that dangle from floating platforms and that you use all the time? They're the platforms' drool (or possibly mucus)... Yuck!
- That One Boss: The underwater mini-boss you fight with Gil. It moves much faster than you can and takes up a lot of the rooms space, it can float in any direction after you, and Gil's only means of fighting it is to stomp it from above and then grab a ball it drops, and if you go right down to get it, it leaves you a sitting duck for it to float right down onto you, and balls fade away after a few seconds, so you're short on time to grab it and throw it at the boss. It is very hard to fight this boss without taking some damage from colliding with it.