It's very good but I think it starts showing its shortcomings when it tries to be more demanding. The fixed camera means it's sometimes hard to judge Z-axis movement especially on Airship-type levels where there's often very little floor to spot where your shadow is projecting. The 3DS stick also isn't great, tends to slip and be hard to keep steady, so sometimes Mario will veer to an unintended direction and I won't notice because of difficulty parsing Z-depth. If the 3DS stick was much better and had an octogonal gate, I feel like I would've enjoyed this game even more.