Hey MaGGam,
so glad you enjoyed the game. This was originally supposed to be updated with more enemies and speed increment and stuff. I accidentally lost the source file of the game from my computer. I hadn't kept a backup either, as this was a simple hobby project. Now I'm working on remaking the game from scratch.
And no, the current version doesn't have any kind of sounds. I will be sure to add them in the next version.
Thank you for playing.