right now the snake moves once every 0.5seconds, if I reduce it to 0.25seconds or less, the snake will move fast, but the player has to respond quickly

Could use some assets but the core game play is there. Like the other comments are saying the snake feels slow, but that could maybe be because the map is pretty large.

the speed is actually the number of units it moves at once, it is now 1 unit(integer), and has to be an integer like 2,3,... that 1 unit is the size of each piece of the snake, so if speed is increased, the size of snake's each part has to be changed accordingly (ie: the faster the snake the bigger it's body parts gets).

as I can see here, everyone hates slow snake, so I try to do something.

looks neat. needs to go faster

The gameplay is fun, but the snake moves painfully slow. It really needs to speed up.

i bet this would be a neat little game but the snake moves so slow at first that i can't take it. if you sped up the beginning just a bit i think this would be wonderful.