Where to even begin...
-Hit detection. How about triggering loss by touching the FACE ITSELF instead of an INVISIBLE BOX around it???
-Predictable patterns. Even if the hit detection didn't make this LITERALLY IMPOSSIBLE, each face makes the same circular pattern as it falls. Also the first wave falls in exactly the same columns every time.
-Background. It makes no sense. Why is there a forest in the background?
-Graphics. Everything is dragged onto the stage with little effort. The background doesn't even fill the entire stage area. Every image in the game is a .jpeg just imported and plopped onto the stage, leaving jagged, ugly lines all over.
-Font. Please don't use that font. Ever. I can't even think of what situation it would be remotely suitable.
-Meme misuse. Why is there a megusta face when you lose? Do you even know what 'me gusta' means?
-Too easy to cheat. This is pretty obvious, but you REALLY need to fix the whole 'move the cursor outside the screen and dodge forever' thing.
-Pointless. You don't even win. Is this supposed to be fun, attempting to dodge infinite waves of predictably-patterned falling faces? Before you answer: No. The answer is no.
Assuming you didn't copy/paste the code from examples and actually know a thing or two about programming, it shouldn't be too hard to make the above changes. But for me to even consider this a "game," you should also add a points system and a scoreboard. Also, instead of just plopping images onto the stage, try redrawing them (or even tracing, I don't care) in flash so they don't look so horrific.
Half a star for attempted effort.