One of those games where if you die even once in the later stages, you're completely fucked. Can't touch the walls, and everything kills you with one hit.
It's a space shooter where you go into a planet that's sentient (even has a mouth), so you're practically fighting it's guts on the inside. All to save your girlfriend who may or may not have her tits out in the ending (the western release is censored). The perspective changes between left-right to up-down in each stage, of which there are 5 of them with 2 levels with a boss battle for each of them. Aside from the different weapons, there's also shield and barrier power-ups that absorb bullets and keep you living longer. You're real main condern is avoiding obsticles, and there comes a time where you would need to AVOID the speed-up power-up you get at the start of each stage otherwise you wind up going TOO fast even with a tap of the directional pad, which wil cause you to fly into something you didn't intendo to do.
I'd recommend it to anyone that likes those hard-as-balls toe-curling games. It was my first ever space shooter as a kid, and I enjoyed it for all it's faults. Music is breddy gewd.