The game is really fun to play. The on-rail sections are really fast and frantic and very easy to get a good hang of. The ground segments are also well designed and fun, but this is where the game mildly suffers due to the controls being, well, kinda weird. You control the camera by swiping on the touch screen, and aim by using the touch screen similarly to an analog stick (but with obviously with a lot more precision). It's hard to get used to and becomes almost cumbersome against bosses, but overall the gameplay still manages to be really fun.
The game is also quite hard if you play on an intensity above 7 (and even 7 turns out being quite challenging). I currently play around 6.5 and new chapters are getting pretty tough already (even though I'm only up to chapter 5).