As a fan of the original game on the SNES (or Genesis, depending on your choice of console back then), I'm honestly pretty disappointed in this remake. The character's controls are completely different from the original game, which were slower and more deliberate and catered more towards platforming and careful combat, and yet the environments and enemy design did not change in order to reflect the change in controls. I found myself constantly running myself off ledges due to not being able to control my character's run speed, but I was also able to float around in mid-air and catch ledges in impossible and goofy-looking ways, so there was never any danger of dying due to fall damage.
Fall damage was instant death in the original game, encouraging you to think about how to move about environments, and every stage had every jump and platform in the perfect position, and everything was exactly where it was supposed to be. In this game, all the platforms seem entirely worthless, and there is usually more than one way to reach the goal by simply hopping around randomly between platforms, and there doesn't seem to be a very intelligent path you need to follow in order to complete areas.
Enemy placement also seems entirely random, especially in the first stage where annoying flying robots would shock you at incredibly inconvenient points, sometimes even during an autosave, causing you to constantly reload from death while having a stupid drone poke you in the eye.
The combat is also irritating and unbalanced. Enemies are almost always attacking you, and there are few options when it comes to running away or attacking. Enemies with guns will shoot you while you try to climb up a platform to safety, as well as the flying drones shocking you and never giving you a decent opportunity for escape. It seems to me that the developers didn't realize that the slow, deliberate controls in the original also required enemies to be limited as well in order for the combat to be made fair. Even though you are given less limited movement in this game, you are downright crippled in several common situations, which makes it incredibly easy for enemies to exploit you and kill you in very cheap ways.
Another grating annoyance in this game for me is the main character's dialogue and voice-actor. He constantly monologues to himself in order to give gameplay hints and witty banter, which is entirely unnecessary and really ruins the atmosphere. The dialogue in the original was simple, straightforward, and reflected the atmosphere of the game as being tense and dangerous. Having your character constantly crack annoying jokes when doing anything from using a healing station to killing an enemy really ruins the atmosphere, and I simply don't understand why they thought it was necessary to write the character in such a way. Another annoyance was having constant gameplay hints and camera pans to show you objects and enemies in order to hold your hand through the game. Game design like this is simply insulting and certainly does not follow the original game's example of clever, intelligent environment and gameplay design that encourages the player to think and experiment with the environment in order to solve problems.
Besides simple design choices that I didn't enjoy, the game has a lot of dissappointing physics and gameplay glitches that make the game feel really cheap. Several times I would watch as my character moonwalks several feet after being killed by an enemy before finally falling to the floor, sometimes even walking on air off of a platform, and one glitch even made me unable to sneak up on enemies and knock them out (something you are required to do in order to complete some sneaking missions), due to the button prompt not appearing consistently.
Ironically, in my case, Uplay allows you to immediately unlock and play the original game without completing any achievements, which I would prefer, simply because this game is very flawed and simply does not live up to the design of the original. Speaking of Uplay, this program succeeds in making playing Ubisoft games through Steam entirely cumbersome and annoying, which gives me one more reason not to reccommend this game.
If you want a better puzzle-based platformer in the vein of Prince of Persia or Blackthorne, just play the original game, or any other game in the same genre. This game simply fails to deliver such an experience, instead trying to offer a shallow action experience with many inappropriate or broken mechanics.