I think the black ninja's are broken, I have bought them 3 plays in a row on the 4th level and they don't attack any mafia. They just stand there and get killed.
I found the sweet spot to be between 15-20m high for little boost needed. Just keep your nose pointed level or slightly above and you can go for a long time. Plenty of updrafts, cranes and stars to keep the speed up and staying below the ~25m height that the jet streams start. Longest flight roughly 3500.
Very laggy. I originally gave it 5/5 because it's really a quality platformer that's very addicting but I changed the rate to 3/5 because of the lag. Fix that one issue and the game would be absolutely amazing.
As a game itself, this one is very easy but has great potential to improve the later BT games with new innovations. BT2 was easy itself, I would often go through the whole game only getting hit a couple of times because it was so easy to level your tank on easy bubbles. Not having the ability to leave a bubble once in changes the tactics of the game, it is now easier to skirt the edge and even use the "bounce" mechanic when you hit the wall to avoid bullets. It also makes it harder in that you can't leave if low on health or you just don't want to fight those enemies. I do like the customization of my tank but the way it is implemented here unbalances just a bit in that you can stack all your guns on the same central point, making a VERY powerful and yet almost microscopic tank. With some simple tweaking of what I see here, the improvements and changes could help make an amazing BT3 game.