Future Ninja

Repost from YMM's forums:

Well, I just want to know what you guys think.



This contains the first four levels of Future Ninja. These are the only ones I have designed. Also, this is just an alpha, so there is no title screen. I can't be bothered to remove that error after you beat the last room.

Controls:
Left and right arrow keys: Move
Up arrow key: Jump
Up arrow key while sliding against a wall: Walljump
Z: Shoot your shotgun
X: Throw a grenade
X+down arrow key: Drop a grenade



The purpose of this thread is for me to get some early input about the game mechanics. So critique your worst.