There are various power-ups, accessed through capsules or destroyed enemies. These provide extra health or a shockwave that annihilates everything on the screen. Another one is time travel power. The amount of time is built up in the bottom left corner of the screen through these power-ups or by destroying enemies in general. Whenever blue halo enemies pass the left side of the screen (or at any given time when there is time travel energy available) the player can activate time travel for a chosen amount of time to rewind the gameplay, temporarily rendering the screen in a haze of grey. When time flows forward again a black shadow replays the ship's actions (moving around, shooting), while the main ship can cooperate with it by correcting mistakes or shooting enemies that passed by a moment ago.
There are also certain enemies that hide in space time and can only be taken out in the small time frame before time returns to the point where the power-up was activated and the black shadow disappears. There is a button to fast forward time as well. During that period all points are doubled. After clearing multiple stages and defeating level bosses the ship gets access to new attacks such as the beam shot, the chain shot or new abilities such as a faster firing rate. These can be used in the regular mode, as the beam shot for instance generates a strong laser, but also during time travel. The player can shoot the black shadow of itself to cause a shockwave or with the beam shot to split it into a large vertical laser.
Next to the regular Arcade mode there is Wave, Time Limit, Survival, Tactics, Score Attack, and Challenge. All of these offer variations of the basic gameplay.