you need to check the box beside the download to make it so you can play in the browser.
I like the game.
1. I dont think level 4 is possible
2. there is a bug that makes level 3's completion bullets appear on the forth level.
Thanks for your feedback! I can ask what do you mean "you need to check the box beside the download to make it so you can play in the browser." Does the browser game not work for you?