Raystorm HD somewhat has negative reviews compared to the original version but it may be due to the high definition graphics and other minor flaws. The first flaw is that the remade HD graphics are not sharp and certain effects are done in the wrong way, not to mention that the explosions and smokes are like blurry shit. Another advantage is the game's aspect ratio. Everything except the title screen is actually 4:3 stretched to 16:9 and having to remake the cutscenes with true sharp textures and 16:9 in HD may be a tough thing someone may have to do to fix that HD version.
Raystorm for IOS has every popular feature from the Playstation version although there are some combined visual enhancements that allow smoother screen fading while retaining the original graphics. Unfortunately, there are too many things at once, there may be risks that the game may end up crashing. Another problem is the camera movement when you move the ship that fast. Sure, this kind of camera movement is everywhere but this problem is likely to be present in various shmup games on mobile devices. Trying to wipe out all exactly enemy battleships from the fleet in Stage 4 is impossible and it's the same for Rayforce's final area due to the enemies getting in your way. And it may or may not be the same for boss battles but this is no Treasure's RS where you have to destroy all the pieces of the bosses before going for the weakspot.