The best defence game I've played in a long time
There were a lot of features I particularly enjoyed about this game. The main thing being the balance.
The upgrade system, I found, was very well balanced for the game length, you weren't able to purchase everything early on and it wasn't impossible to have everything by the last few stages.
The graphics were efficient enough to be able to run well on bad computers (e.g. mine) but pleasing enough to the eye to admire.
The difficulty is what I found outstanding. Easy mode was fairly easy right up until the end but definately wasn't a cakewalk, you had to try. Hard mode was a league away from easy, even in the early stages you sometimes had trouble, but it wasn't impossible. Medium mode was a very good balance in between the two.
Although fairly short, the campaign was very well put together, gradually increasing the difficulty, teaching you what needed to be done, introducing new aspects at regular intervals (rockets, then emp, then nukes) It wasn't short enough to make you think it was worthless yet it wasn't long enough so that you got bored part way through.
After playing through campaign mode a few times (on different difficulties) survival mode was easy to get into but got very challenging very soon. The ability to upgrade whenever you want is very handy and keeps the game flowing nicely.
Overal a great game, good job.
