First, this is done all wrong. A game involving Yahtzee MUST involve spunky teenage JRPG characters fighting Hitler be an FPS staring everyone's favourite hat wearing Aussie prick critic. Platformers are really over done I find and are a dime a dozen online. Likewise with FPS's mind you, but at least they are more creative and enjoyable.
Second, sound. There needs to be some form of music added to this game. With it being all quiet and everything I was quite bored.
Third, fix the attack. Light shining out of your crotch is not an attack. Back handing Hitler's with either Yahtzee's hand (or cock) is a real attack.
Fourth, platforming doesn't really work when your just jumping a 2 foot high ledge onto the next 2 foot high ledge. Make it so you can jump higher, farther, and have bigger gaps.
Fifth, calm down on your posts. The attitude that you are taking is similiar to the one used in Yahtzee's review on Webcomics. Calm down, I know people criticizing your work can be frustrating, but you have to approach it with a calm attitude and try to figure out what the responses of the people playing it are so you can adjust it to meet your audience.
Sixth, for the sake of stressing myself, please change this into an FPS. It would be fun playing Yahtzee in an FPS where he shoots a gun firing shurikens and lighting at characters from he previous reviews.