Wow, this is a really fantastic game. So fun I kept playing and playing, finally got up to #2 on the leaderboard with ~7000 points! I think if it was a little more forgiving it would be easier for people to get hooked. My suggestions would be either an indicator that an enemy is about to appear, or the enemy doesn't kill you if it spawned less than 0.5 seconds ago. Plus a smaller hitbox for the player as sometimes turning corners would push me into an enemy on a nearby opposite wall. Those are small details though, the game design and art style is really great. Keep up the awesome work!