it's a fun game that you will want to play over and over again
the characters are hilarious and you fell like literally lol-ing from some of the dialogue.some of the levels are easy, and some are perplexing,and it's super fun the go flying through portals at high speeds. note: on level 16 in the tests there is a Easter egg,when you walk through the door there will be a turret in a vent,point the laser at it and it will explode so will the vent,then crawl through the vent and there will be four turrets singing in harmony.the voice acting is also great,Cave Johnson (who you will later "meet" in the game) is hilarious and you want to follow his story on how the portal gun and the different goo come into play.the last level is easy (a least for me) and it took me to tries so i kinda wish there was more to the last chapter but other than that the game was highly addictive and like i said before:it's a fun game that you will want to play over and over again