1 - Never buy power or range boosters, always take the interest.
2 - Never upgrade a tower - $ for $, you can never buy as much power upgrading as you can by buying multiple towers.
3 - I've never purchased a green or purple tower.
4 - The biggie - You need to use the fewest amount of towers possible in each level. The more money you have in the bank when you send in the next wave, the higher your score.
Hmmm - what towers become more powerful by upgrading when you compare money spent?
Big red is $2,500 to buy, $1,250 to upgrade. Here's big red's chart:
For $5,000 I can have 2 big reds or 1 big red upgraded 2 times.
2 big reds = 60,000 damage
1 big red upgraded 2 times = 57,272 damage
For $7,500 I can have 3 big reds or 1 big red upgraded 4 times.
3 big reds = 90,000 damage
1 big red upgraded 4 times = 84,544 damage
For $10,000 I can have 4 big reds or 1 big red upgraded 6 times.
4 big reds = 120,000 damage
1 big red upgraded 6 times = 111,816 damage
For $12,500 I can have 5 big reds or 1 big red upgraded 8 times.
5 big reds = 150,000 damage
1 big red upgraded 8 times = 139,088 damage
So, for my $12,500, I can have one "bullet" doing almost 140,000 in damage; or I can have five bullets in the air at the same time doing a combined damage of 150,000.
Hmm, good info. I'll have to try again using those ideas.
Thank you very much Appletom and Mickey, I will try it again tomorrow.