All you have to do is to get into your spacecraft and blast your way through hordes of aliens. Destroying each and every enemy in your path and collecting bonuses can make your guns stronger, your remaining energy higher and your spacecraft stealthy. This can be done by pressing the spacebar or waggle the joystick from left to right to engage the highlighted upgrade depicted as ENERGY, STEALTH or WEAPON at the bottom of the playfield. Note that stealth and weapon upgrade are time limited. The game offers 6 sectors, each one divided by two sun-sectors. At the end of each sector, you are called to confront a mother-ship, each with its own strengths and weaknesses.
It is easily noticed that the gameplay and storyline is almost identical to the Project-X title. In between sectors there are bonus stages in which you gravitate towards gaps in the walls which alternate from top to bottom, left to right. Strangely enough, the gameplay area is depicted in a... Sega GameGear frame! The longer you survive in these stages, the bigger the bonuses carried through into the next level.
Much like Project-X, the difficulty is set rather high, in such no matter how powerful you become, your ship seems always underpowered and when you lose a life, your firing power gets reduced and it becomes hard as hell!
The game's visuals are superb, offering multi-layer parallax scrolling (so many, that give the impression of the naturally scrolling horizon in some sectors!), hundreds of on-screen colors (up to 137!) using Copper effects, and dozens of fast and smooth animated sprites. Scrolling is extremely fluid too. In contrast to Project-X (which uses up to 64 colors on-screen) there are no pre-rendered sprites here.
Much like Project-X, the game is full of high quality sampled sound FX and the robotic voice that warns you of your status are greatly sampled and fit well to the whole atmosphere of the game. The absence of music during gameplay is on the negative side of this title, but the quality of the sampled SFX makes it fantastic.