I have a question.
Why did you name this Shadow The Hedgehog: Blood lust?
There doesn't seem to be any instance in this game where Shadow kills anything. In fact, jumping on top of an enemy (the traditional way to kill an enemy in just about any platformer game) makes you have to start over.
Also:
1) You have music that is too loud and loops endlessly-- which gets extremely annoying after a few seconds.
2) The level design is virtually non-existent, and game play was entirely unfitting for what I assume was supposed to be a 2-D Sonic-type game. This makes the whole thing very, very boring and uninteresting.
So, how can you fix this?
Well, for starters, you could try using actual music from the Sonic games. There's a lot of it, and you can get it from just about any sprite site. Then, make sure it's not too loud, so that it won't drown out everything else and hurt the ears.
Secondly, try to make the game more like a legitimate Sonic title. If you have ever played a Sonic game before, you know what that means. Lots of Running fast and platforming, with rings strewn all about the level, and a few loops and springs thrown in for good measure. Again, just about any sprite site has stuff like this, so look into it.
Final Verdict:
2/10
Not very fun to play and in serious need of work.