Very good game, one of the best SHMUP on the Famicom for me.

Solid soundtrack, nice gameplay, powerfull weapons.

The stages are great to go through, each one full of ideas like the last stage with enemy ships that can merge. I really enjoyed playing this game, especially since it is fluid and only lags on very rare occasions, a rather exceptional fact which takes full advantage of the console's capabilities and manages not to really lag, it's quite incredible.