Try again.
First off, I barely see any effort put into the game. The main character is horribly drawn and the zombies are cut and paste (did you even draw the zombies yourself?). The controls are wonky. After I started up a level and I would be shooting behind myself or straight up into the air while my gun faces forward, really? Then after level three the zombies some how learned the ability to slide across the screen. There was no warm up. A good thing to do when you are creating the game is at first let the player understand what they are doing then progressively get harder. Not let the levels get harder then all of a sudden the player repeatedly dies in a flash. That doesn't help the game at all in reviews. For example I 'love' how in level 4 how you have to jump over the zombies who are going through the floor. But you cannot physically jump over them or can you shoot at them. There's no point to this, sorry. Try again next time.