This game has some great design and music, but falls short of it's potential.
This may be a personal opinion, but when I consider a "strategy game", I interpret that as a game that has a few ways that it can be beaten, while none of them are necessarily "required". In most tower defense games, you can mix and match towers for flavour, and can find ones that make your life easier, but there is no set "required" combination to win. By this definition, the game is incredibly linear. You need -every- experience point you can get to scrounge for level-ups, the cash is unbalanced as you have more than you can use for the first few levels after getting the maximum number of sunken colonies. The game felt almost like a puzzle game more than strategy, as if there's a specific way to win each level that you -have- to follow, else you'll die.
What really killed this game for me, however, were the nukes. Trying to locate the ghost in time for the nuke to fall was just ludicrous.
Consider this. After being unable to pass the first nuke level from multiple attempts, I tried playing a hacked version of this game so I could see more of the game's content. However, even using a version of the game with -unlimited health, energy, money, and boosted experience-, I was unable to get past the first level where the suicide tanks appear. Why is this? Again, due to the ghosts.
I've played -many- different games in my time, and have tower defense games as a personal favorite, but this was far too broken to enjoy. Using true sight, every area attack I could, and bringing the discharge ability over every possible hiding spot, I was still killed by a ghost's nuke.
When you've made a game that's unplayable even with the cheats enabled, I think it's time to take another look at what you're working on here.
+ Good visual appeal
+ Fitting sound
+ Good sound effects
- No real "strategy"
- Ghost's nukes break the game
- Balance could use some work. (Energy regen, tower usability, etc. Can't fully rate the balance since playing normally was impossible past first ghost.)
Overall Rating - 4/10