Horrible. Enemy AI is terrible. A single enemy can pull off insurmountable combos, and if you have the misfortune of having to fight more than one at once, you're almost guaranteed to die. Take out the stun aspect and you've got a decent game.
Two things:
1) This is the best Merlin's Revenge!
2) [Play Merlin's Revenge 3] button at the end is screwed up: It loads the Kongregate MR3 page within the game window. Make it load in the browser page instead.
Terrible. Our weapon level shouldn't change if we acquire a new weapon, or at least give us the option not to get the new weapon if we accidentally acquire one.
Also, from Wikipedia: "Blue shift is the shortening of a transmitted signal's wavelength, and/or an increase in its frequency. The name comes from the fact that the shorter-wavelength end of the optical spectrum is the blue (or violet) end, hence, when visible light is compacted in wavelength, it is 'shifted towards the blue,' or 'blue-shifted.'"
Poor movement and horrible boundaries; on stage 6, I simply walked off the stage and had to restart the level, but when restarted, the screen was black.
 "Tangerine Panic!"){kind=icon}
 "Uber Pool"){kind=icon}
 "Globule"){kind=icon}
 "Snotput"){kind=icon}
 "The Egg"){kind=icon}
 "The Necronomicon"){kind=icon}
 "Epic war"){kind=icon}
 "Hexiom Connect"){kind=icon}
 "Boombot"){kind=icon}
 "Achilles"){kind=icon}
 "Jumpcat"){kind=icon}
 "Merlin's Revenge 2"){kind=icon}
 "Blueshift"){kind=icon}
 "Matcheroo"){kind=icon}
 "The Last Stand 2"){kind=icon}
 "LRU 3: Darkness Reborn"){kind=icon}
 "Armed with Wings"){kind=icon}