Thank you very much again!
I can add a very smooth shooting effect that can complement the soundtrack while giving an audio feedback to the player.
Camera shake feels like a good improvement too. Also the player can be informed differently for different types of level restart, like bumping into obstacles or going out of the screen boundary.
Thank you very much for your detailed feedback. I will try to improve the game based on them. And good luck with your submission too! I will play it as soon as I am in a Windows PC.