The no sound was intentional just for simplicity. I really think it would benefit from sound so will most likely add some background music and jump / death sounds.
As for the penguin texture... that's a huge bug and needs to be fixed. On my testing it rarely occurred and could still not go past them, was just visual. Could be due to different screen resolution causing this? Either way, thank you greatly for noting this as this is a game breaker. I will fix and update the Dev Log as well as here with changes.