New shooting zombie game

So I made a game which is my first real modd.io game so pls check out and give feedback!
https://www.modd.io/play/muskets/
So basically you just shoot zombies (R to reload) and buy stuff with ur money (B for shop) and I’m planning to add more. Pls suggest ideas and also complete the polls below:

Is this game good (i.e. meet the bare requirements of a new game)?
  • Yes
  • No
0 voters
What to add next?
  • Different zones
  • Boss that spawns every minutes/seconds
  • More items to buy
  • Different types of zombies (spawning by chance)
  • Other (put in comments)
0 voters