I'm guessing you already know this but the buttons for your menu don't work except for the play button.
Other than that It's pretty interesting. For the plot I suggest something along the lines of this:
You had always dreamed of being an interplanetary explorer but sadly you're too young. Your parents want you to marry some girl who you don't even like. All your friends hate your guts now. YOU WANT FREEDOM! So you right before the "big night" with your GF you steal your parents HSS-Spaddle Paddle and launch off (sort of like SpaceBalls). However, you forgot to fill up before you left and you quickly run out of fuel. You manage to aim your ship towards a hospitable looking planet and crash there.
The next day you wake up. Your parents crappy ship is totaled. All communications are down. And you barely have enough food to survive for a couple weeks. However, you did manage to salvage a weird looking device. After strapping it on and pressing some buttons it boots up and you realize it has the power to change the gravity surrounding your body (Tutorial).
You start exploring for any life forms on the planet while learning the terrain (more tutorial). After the second day (or so) you oversee a robot/thing extracting raw (power) crystals. You follow it back to it's base and after hesitating you sneak inside. While inside you see the blueprints for a BioChecmical weapon that has the capability to destroy every type of organism on any known planet. The CEO of the company leads back to your home planet. Intrigued you devise a plan to take down the boss of this evil, polluting mining facility.
Along the way you meet a robot you reprogram/ stranded person like you/ outcast/ A.I./ intelligent animal/ creature. They become your companion and help you throughout the story. You fight multiple mini-bosses during your time on this planet all in different places. (1-2 outside of the mining factory- like natives - and 3-5 inside the factory - which would be robots, melting factory robot, bio-chem robots, and a Captain/ Supervisor of the factory.
You finally defeat the boss of the factory who presses a self-destruct button as s/he/it dies. You grab the latest and greatest space ship and fly to your home planet to stop this dastardly fiend. When you arrive you find out that your home town has been taken over by some evil robot and the biochemical weapons have started to work. Everyone is dieing or captured by a self-proclaimed "King" who's been enslaving people to test his/her latest weapons on before he/her takes over other planets.
You fight your way into the "castle" and find yourself next to the "King". The character reveals himself, and you find out it's your evil long forgotten uncle or your step-dad. He then gives you a choice. You can either save the love of your life which is revealed to be one of your close friends or you can save your kingdom.
You're like, "BS, I'm gonna be Mario". So you strap on your Grav-Lift, save your GF and then follow the evil "king" as he escapes to his lair. Along the way various machines and weapons are fired at you but you survive them all to reach the "King" who you then defeat. Happily ever after blah blah.
NOTE: S/He might could also reveal their identity moments before they die, whatever you want to build suspense.
And there's my 15 minutes of crazy, thinking. This should really have gone in the game idea and design section.
(: (Hope it made sense)
Edited by Jster391, 26 February 2012 - 10:38 PM.