Warning:I think this can affect to epileptic people, it does not say that in the description or the game but i think because of the colors (not too many but still...) and of a review i read you should be carefull
Hi guys here I will leave you a link to a game that is very addictive and entertaining, also challenging
the games tell himself what is about so you can skip this review and go right into the game: http://www.newgrounds.com/portal/view/678326

This is a old style game about a ship that destroys ships, well is not a ship we can call it "light" and the enemies are the darness and the boss is the darkness itself

you need to beat the boss in order to win the game, well is impossible because things repeats itself over and over but you don't lose stats and you get stronger overtime by leveling up even though things repeat himself you still have your skills
you can upgrade your stats like armor, points(arcade mode), fire rate, damage, and spread, the game tells himself what is about xD it keeps you playing for hours and is really hard though, specially the boss 

Hint:concentrate in dodging the bullets, do not keep too much attention or hitting the enemies specially with the boss battles

SPOILER ALERT l l l
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Rebirth Ending:Kill the boss, without darkness, gravity collapsed with the universe, the eternal hunt to destroy darkness starts again years later after a star appeared, you don't remember really what happened you just have sore memories everything sounds familiar but you don't seem to remember very well what happened, the only thing you don't is that you need to find him and destroy him for good once again
Darkness+Light: At the end, when you get on rage, DO NOT KILL THE BOSS, point somewhere else until your rage stops. Darkness and Lightness will spread over all the universe, you finally understand what the Darkness means when he told you that the universe can't exist without him, a star appeared again and you lost some of your memories, you think that what happened was a dream (you can notice that because he says "deja vu?") and he once again tries to fight darkness
nothing changes not matter what ending you get, boss will have the same attacks also the enemies, the only thing that changes are the texts and the endings (obviously) but everything will get harder no matter what ending you get and your attacks will be the same