Pretty good, but could use improvement
It is a nice addition to the very overused snake idea, but the rotational control makes it a lot more fun.
I think that starting so slow makes it kind of boring. I got tired of playing a little after Level 3 or 4. I still think it was a good game, but if you plan on making a sequel, you should focus a little more on addictive gameplay; powerups, faster speed, unique levels.
This game honestly is still just a little bit higher than most snake games in my mind, so hopefully you can turn this into something great :)
Nice job!