I understand that it "works" with all browsers. Yet I dislike a lot the idea of having to disable every kind of security system on my browser to play this.
If someone beat the level 12 please tell me how. I struggled to survive just to get in an endless battle, where i've got more gold that i could ever spend and no way to win because no matther how i combine my 18 guys they die way before they can hit the wall, since the enemy will spawn like 12 units/second while his cannons kill my guys.
The music is good for this kind of games, the game is quite fun and has potential.
Two suggestions: Add an upgrade window after "Retry", and maybe another upgrade to nullify the angle limits, its annoying when you're flying from side to side to find your weapon stuck with that angle limit.
I won't rate it nor play it yet, since the balls are buggy to me, they start to stack false balls from previous levels or retries which don't really exists, not playable at all that way.