The save feature is not finished and may glitch. Arrow Keys to move. Up Arrow to jump. Space to attack. Down arrow to enter morph ball (Down again to unmorph) Space while in morph ball to place bomb (If you have one) R to switch from Missiles/Beam Hold M for Map. SAVE/LOAD: To save at any time, press S. You will get a Save Code. Then you can save the code and load it later. It is not recommended to save while in a boss fight. Also, this feature may glitch.
There is a Metroid Scratched 2, which is better. NOTE: There may be bugs. For example, if you are in the morph ball and exit a room, you may get stuck in a wall. Also, with some new features like the Save/Load, there may be glitches. Credits: Metroid by Nintendo Most of the Samus Sprites from: https://scratch.mit.edu/projects/165267307/
