Platform Shooter Prototype

Hey,
I am working on a platform shooter at the moment and I have a first playable prototype. It is just a test level with 3 enemy types with some kind of AI. Here you can test it:

https://dl.dropboxusercontent.com/u/30224346/Shooter/index.html

Control:
Arrow Keys: Move/Jump
Y or Z: Grenade (german <-> us keyboard)
X: Shoot

What do you think so far? Is the control smooth?

Thanks. Yep, using forces for all movements.

Very nice so far. Keep it up.

Nice! Solid pathing on the enemies, tight and responsive controls, looks good!

Feels good, good luck!

Here is a new version:
https://dl.dropboxusercontent.com/u/30224346/Shooter/index.html

Control changed a little bit:

Arrow Keys: Move/Jump
Y or Z: Grenade (german <-> us keyboard)
X: Shoot

What am I shooting...?

Bullets. But I think it's more realistic when you can't see them.

Oh. Haha... I meant WHAT was I shooting AT.

With the current weapons I'd probably run around and throw grenades all the time.  The gun seems too weak, even with the range advantage.