Controls are a bit hard to use. It makes it awkward to move the character using this configuration. I might suggest a mouselook for the y rotation and arrow-keys for moving forward and strafing, much like FPS controls might be. Also, you might want to make the controls more responsive. Just my opinion though. Like the art style of the game, think you've got that going well. Keep it up!
Kind of troll-tastic to post a screen like that and have a game like this. You may want to update the screenshot to something that reflects the game better.