This game is pretty seriously bugged. On the first level if when you're collecting the bullet you move up enough to hit the wall, then you bounce downward and keep going even if you don't send movement commands, while the red square stays stopped. On the third level I got killed and now if I try to reset it I just instantly die and I think (based on how the screen flashes for a millisecond after clicking reset) the positions of the squares don't reset to the initial positions for the level and instead just go to the last positions when I died.
The description of the game doesn't actually describe how you're supposed to play it. You're the red block and need to pick up the small bullet and use it to shoot the blue block. Movement by mouse-clicking the movement buttons is incredibly clunky, and keyboard controls would have been far better. But the most important issue is that the gameplay itself isn't fun to begin with -- it's just a matter of pulling a fake to make the enemy go in the wrong direction and then grabbing the bullet and shooting. I wouldn't recommend just adding more levels to the current game engine; it seems like the engine itself needs to be reworked in order to make a fun game -- either an action game (where the enemy moves spontaneously and not just when you do, and can fight back if you're not quick and good enough to beat it) or a strategy game with some real puzzles to solve.