Sssnake

From MobyGames:
'Sssnake is a basic Snake game. The player controls a snake in a small room filled with food and obstacles. The goal is to eat all the food while avoiding the obstacles, but whenever the snake eats a piece of food, it grows longer, making it more difficult to maneuver. The snake moves forward at a constant speed and can be turned in the four cardinal directions. Holding a button will make the snake move faster, making it harder to control, but increasing the potential for a time bonus.'

The game loops endlessly after 10 stages, so I lose my lives on purpose after completing one loop. And yes, I was already aware of the A button for speedup, but the snake already moves fast enough and even at default speed, controlling it is somewhat difficult due to unpolished controls.

00:00 - Start
00:24 - Stage 1
01:19 - Stage 2
02:24 - Stage 3
03:21 - Stage 4
04:25 - Stage 5
05:28 - Stage 6
06:34 - Stage 7
07:44 - Stage 8
09:05 - Stage 9
10:16 - Stage 10
11:25 - Game Over