Really enjoyed it.
The artwork was great, I didn't experience any of the bugs that people seem to be bitching about, and I enjoyed all the different boss battles and even the puzzles thrown in there. Now, I'm not saying it was perfect. The controls were rudimentary, and movement was a bit slow. Also, I'd prefer to have one life with a Health Bar than one hit kills and 10 lives, but that's just a question of HUD. Though that would eliminate the death animations. OF course, you could get hit, do the death animation, and then just reverse it and have the corpse spring back to life, but again, a quibble. Very good, though.