Once you get a hang of the controls, it was hard to put to down! I think adding some type of health bar or some other type of indicator on how many times you can hit the wall would be helpful, since I didn't know what the metric was for the player's HP (I think it's based off the tail length, but it doesn't seem to be 1-1 with the food pickups, which is a little confusing). I never managed to make ti past the first level, but I really enjoyed what I played! The color scheme is great too :)
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You're right, the health is just the tail length. Each time you hit the wall a certain amount of points are removed from the front of the snake. If the snake is shorter than that number of points then it's game over. You are right the number of points that get removed isn't the same as the number that get added with pickups, so it's not 1-1. I might experiment with making them the same, that's a good idea. Thank you!