Everyone, THIS IS A DEMO
I notoriously hate demos posted on NG. That's not what this site is for. Hell you guys even have a mochiad at the beginning. Get every penny you can for a game, right? Ha!
As far as the game itself goes, I think the design is fairly sound. The tank having to get to each space adds a twist for movement. The destructible levels made me feel a jolt of nostalgia for games like Centipede. Essentially, this felt like Boxhead with a tank and a more traditional flashgame upgrade system. I like both systems well enough.
For those who are considering buying a new game, realise this one does not have a lot of replay. It is polished to the point where it's fairly pretty (by 1999 2D standards) but it doesn't have a story, doesn't have alternate characters, nor multiple play modes or even multiplayer/online play.
To get the same experience you get here, and then some, go play some IndestructoTank and then chase it with some Boxhead. If you want the turn based upgrade system, just go find a random tower defense game and play that.