The concept behind the game is pretty interesting and has potential: an arena shooter where you can shapeshift into any of the 7 sins.

At first, I didn't get how to play it properly, even with the controls, and I still didn't get to change into another sin, as I keep dying in-game.

The graphics are nice, I kinda liked the style in them, but I couldn't hear any sound in here. :/

I feel that the game's kinda unbalanced in difficulty, because it's too easy to die in the very first wave, as the fire ratio of the first mob is higher than my fire rate and my speed. That could make the players feel kinda frustrated about playing it. :/

But you've got a great concep in here! Maybe making it into a twin-stick shooter would be a good thing too, since shooting with the keyboard makes it a bit harder to shoot on some enemies. :)

Good work, Cheers! :D