I played the web version, using Vivaldi.
The font on your game page is a little hard to read. I like the greens you used, but the yellow font doesn’t have the greatest of contrast against it. Using a darker green for your background with the yellow or picking a darker colored font would help make things easier to read.
I liked that Normal was the difficult you used for the web version. It gives folks the ability to get a feel for your basic game and then decide if they want more options.
I think you could have made your game board a bit larger. Playing on a computer, there was a fair bit of unused space on either side of the main playing field. I liked that you added colors to that space, but didn’t add anything that was too distracting to it. What you could possibly do is enlarge the board a bit more and move the scores, directions, start, and pause buttons to the side. It is fair to acknowledge, though, that the layout as is would probably work well for a mobile device in portrait mode, so depending on your target audience you may or may not want to move things around much.
Everything was fairly easy to read in game. Your color choices worked pretty well to convey information, and I could read the text on them.
I didn’t notice any sound on the web version. Having some background music and basic sound effects for things like collecting a piece and game over would help make the game feel more complete.
I’m not sure what I thought of the shadow effect at the end of the snake’s tail. It makes the snake feel longer than it actually is and was a bit confusing at first. Once I got use to it, though, it was a cool effect.
When I started a new game, using either the “Play Again” button or the “Restart Game” button, there was a brief afterimage from the previous game. It showed both the old snake and piece of food as well as the current snake and food briefly before the old disappeared.
The game also sped up each time I started a new game. The first couple of new games it wasn’t really noticeable, but the more I played the faster my snake moved. Refreshing the page altogether returned my snake to the starting speed, but starting a new game from the game itself resulted in a faster moving snake.