This has good potential! I had fun but got frustrated by dying without any apparent reason. I was more than a square away from closest wall and didn't go into myself. Bad loser, apparently :D
No but I think you could have added a death animation, or crash animation and made sure that it happens when you actually crash into the wall. Now it happens WAY before any real crash occurs. So that was a little sad to me.
Music fit very well, good jungle theme :D
Also interesting idea to have an objective driven snake with wagons, it was an original take on a classic game.
The controls were what made me quit after a few levels.
Cool game, well done!