Its not that bad of a game but the repitition makes it boring and not very fun. Only three continues means you will play the first stages over and over again so its going to get very boring.
Graphics are pretty good for the NES, but its clear it was only cool back then because of the '3D'. It has very little to offer anymore however.
Sound is okay and happy, and the bosses are also alright but the 3D effect makes it hard to see what is happeneing making it chalenging for the wrong reasons. A very meh game. I would not recomend it.