This is most likely one of the already-reported issues: Firefox will block the game at this point if third party cookies are disabled. I'm working on a fix.
Advice for the hard badge: Don't bother to finish all levels with a perfect rating at first. Get the better ammunition at the end of the game and finish off all levels in a cinch (and wipe the grin off their faces...)
Like wow, I love the GFX. At a later stage sometimes it is a bit difficult to see the mouse pointer, though. And I'd love to be able to restore some health on the way, or maybe get temporary powerups like shields or smart bombs. Other than that - brilliant game, thank you.
Thank you so much for the feedback! and well, Players already can heal up 1 health square every time they upgrade, and at certain upgrade level you'll heal all of your lifes.
Hey man, seems like this has been a sporadic problem for users on Kong, check this thread out https://www.kongregate.com/forums/7-technical-support/topics/617121-cannot-play-unity-games-connection-is-not-secure
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This is most likely one of the already-reported issues: Firefox will block the game at this point if third party cookies are disabled. I'm working on a fix.