On early levels, the game was exciting! I love the soundtrack and that each enemy has its own spawn sound. But at some point it became worse: millions of edges were lying around and dropping fps, green snakes started glitching, soundtrack interrupted right after the start and the songs kept changing. I produced so many bullets that enemies were dying right at spawn. After level 30, it became literally unplayable.
Don't get me wrong, this game is awesome and has a lot of potential. But right now, the lategame is boring and glitchy. You could make the edges merge into larger groups (or add an upgrade for it) to improve performance, and buff the enemies' hp over time to keep the game exciting.
Thanks for the game, good luck in further development!