Unlike Aeon, I am an epic hardcore retro gamer girl who has beaten gotten to the final level of Battletoads without cheating, so I was able to beat this game without cheats (on my second try). I liked the different powerups, though they're so much more powerful than your normal shots that they trivialize encounters like the Wriggle fight. Maybe that's okay, though? The game screen was sorta zoomed in, but I could manage just fine.
Also it seemed like the Master Spark got way bigger as the Yuuka fight went on, which was nice. Though I do wonder if you could've introduced attacks other than the master spark for the final fight, and either made Yuuka's health lower or given a powerup in the middle of the fight to compensate.
Beautiful audio as well. Brings a tear to my eye.
In short, 'twas nostalgically arcadelike.