Loved this game, a great challenge with many different approaches to winning. I loved that the upgrades weren't all plain old increase damage, attack speed, or range upgrades. Things get a little insane in the free play mode lol, level 57 got me. I had a couple errors though, they didn't seem to effect the game, more like warning popups.. I think it was the effects for towers not showing up. I got the message:
TypeError: Error #1009: Cannot access a property or method of a null object reference.
I also got another before I lost about pineapple bombs, is this on my side? The popups started around level 40 and I end up getting about 5 or 6 per level, with 2-4 ice towers on the map. And yes, my flash player is up to date.