• Partially non-linear structure (gained sub weapons are sometimes needed to damage bosses, seventh planet appears after beating the first six)

• ​Can leave a planet at any point to go to another one)

• Power requirement for some weapons (power also works like ammo for all found weapons)

• ​​Password save on any screen

• Basic sub area/planet maps (shows your location, the basic layout and where there are buildings but no topography or where the bosses are) - no top down view maps but those rooms are one screen only anway

• The fins found on the red planet are needed to traverse beneath the surface on the water planet

​

Playthrough - Review​ - Mini Review