One of the defining elements of the Metroid series is the ability and nessessity to collect power-ups which aid exploration.
Morph Ball Upgrades
The Morph Ball is one of the most recognizable aspects of the Metroid series. Pressing 
twice allows you to morph into a round ball that can go through small passageways. It is also faster than walking.
In this game, you start with this upgrade.
Bomb
When in Morph Ball mode press 
to lay up to a maximum of three bomb at a time. Bombs can break certain blocks, hurt enemies, and propel yourself upwards indefinitely.
This upgrade can be found in the first ruins.
Spider Ball
Pressing down while in Morph Ball mode allows you to use this upgrade. It allows you to crawl on walls and ceilings. Pressing 
, getting damaged, or being hit by your bombs automatically disables Spider Ball mode.
This upgrade can also be found in the first ruins.
Spring Ball
Press in Morph Ball mode to jump.
This upgrade is in the second ruins.
Beam Upgrades
All beams can be fired by pressing .
You can only have one beam upgrade at a time. Fortunately, all of the beams can be found in the fourth ruins in addition to their normal hiding places.
Ice Beam
Freezes most enemies on contact. Found in the first ruins.
Wave Beam
Goes through walls and armored enemies. Travels in a wave pattern. Found in the second ruins.
Spazer
Fires three parallel beams. Found in the third ruins.
Plasma Beam
Goes through enemies. Also found in the third ruins.
Jumping Upgrades
What's a platformer without some form of vertical movement?
High Jump Boots
Increases the height of your jump. Found in the second ruins.
Space Jump
Allows you to repeatedly spin jump. Found in the third ruins.
Screw Attack
Makes the spin jump instantly kill most enemies. Found in the fourth ruins.
Varia Suit
Halves damage received and, curiously, increases your walking speed. Found in the second ruins.