The good, the bad, the little interactivity.
The good- People like shooting stickmen, and there is some good enviroment interactivity.
The bad- People like killing stickmen, more than one way, with more weapons, with a challenge, with hidden things, and worst of all, stickmen killing has been done to death.
The little interactivity- Not enough interactivity. You can shoot only on a stickman, only once, and you are left clicking random things seeing if anything happens.
The verdict- More interactivity with everything, more weapons, more challenge, and you have a good killer.