Been playing through a few Turbo games lately.
Finished Psychosis which I think is a very average shooter. The premise is interesting, but the game never seems to be anything but mediocre. The weapons are boring, the enemies are uninteresting and besides some parallax scrolling the graphics are uninspired. It's also very difficult to recover after losing a life due to a lack of power-ups and very slow moving ship.
Also finished Fantasy Zone. Never played past the first 3 stages in this game before shutting it off before, but I gave the game a chance and played through the rest of the game. I like the colorful worlds and boss designs, but the game is a little on the simple side, not to mention short. Still its kind of fun to pick up and play.
A also tried to 1cc Final Soldier and made it to the final boss, but ran out of lives. 
I think I made it to the final level without losing a life, but the difficulty really ramps up on that level!
Yeah, I think the game is easy, but the last boss can be a challenge especially if you lose your weapons. The E weapon seems to work best if you can keep it at full power for your last confrontation with the boss.
