This game was pretty fun to play, but it feels unbalanced in a few ways. For example, the crowbar is much stronger against the first type of enemy than a pistol. If I can distance myself far away from the small jumpers, I can snipe them in two shots with the pistol. The AI can be exploited to hug up near a wall, where the player can spam the crowbar and kill from behind a wall.
Story was pretty interesting, considering I never played a Half Life game. I'm looking forward to Day 2 of this spin-off; the only question I have is this: "Is Day3 confirmed?"