Compared to its predecessor, Izuna 2 is a much more fleshed out and realized Mystery Dungeon game. In addition to having more of an actual plot, there's an expansive roster of playable characters, more dungeons to go through, tons of new weapons with interesting effects, and a useful super attack in the Tag Attack mechanic. Additionally the game has gotten a pretty good face lift as far as the sprite work goes. There are still quite a few rough spots though, with the game often feeling a little slow in progression despite how short it is. All new characters join at level 1 and there's no leaked experience, which heavily discourages using anyone outside of who you initially gravitate to. The game still also lacks staple mechanics of the genre like in dungeon shops. On the more mixed side, the game has retooled how SP works, having it drain overtime and penalizing you for staying on a floor for too long by making it drain faster and faster. Your mileage may vary on whether or not this was a fair addition to keep the game challenging. On the whole though, I'd say this was a step up from the first outing for Izuna, and I'm excited to see what they'll do with that reboot they're making.