This game is very, very hard, but in no way is it unfair. It's the kind of hard that makes you want to try and try again. You did an amazing job with this game!
I miss the nice auto-shot trick in the first one where you held down a and clicked off-screen. I feel like a lot has changed for the worse in this version.
I have a Macbook Pro with 4 GB RAM, Flash 10, Firefox 3, and lag??? The lag totally kills this game. This game is terrible because of the lag.
Also, why does my guy stop moving to the right? If I run into a wall, he stays there. If I press the walk right button, I can see his feet move, but he stays there.
Way too buggy to be enjoyable.
I enjoyed it. I think the criticisms of being too easy are fair, but I think you have a solid base of good game play here. I hope you continue to work on it and make part 4 even better!