Awesome!, Thanks for your feedback.
Here is our plan for the next iteration:
1. The game will need to be balanced, me myself can't even get to stage 4.
2. The table is too low, need adjusting.
3. Health boosts will be on the table for sale in the next update. So it won't waste the precise bullets.
4. And yes, we will add sound feedback!.
Sincerely
Brian Li