Seems pretty fun.
Well, I like that you added the ability to use either the WASD or Arrow keys, for this type of game. Something I really detest however is the use of shift key to run, while it might seem like a neat feature to implement from a coders perspective it's honestly just annoying for the player, if you were going to have a walk/run feature and stamina included to control the limited use of running to increase difficulty then it needs to be a toggled feature because the fact that walking is so slow and running required me to hold down shift made this game a lot less fun for me.
The ability for multiple weapons is of course very nice, and I actually like these type of graphics. However since you designed the graphics the way you did I can't see the player and get a feel for the reload time so a reload bar such as in Dude and Zombies would have been a nice touch.
All in all a pretty fun game, personally I would have liked the overall speed of the game to be faster possibly by a factor of 1.5 -2, A visible stamina bar, and possibly longer rejuvenation time for the stamina so I would have had to put more thought into when and when not to use it. and all of the above mentioned feature implementations. Just some constructive criticism and not meant harshly in any way whatsoever. Good work, hope to see more from you.