Do not like Demos
I seriously don't, but even then I loved this game when I had it on the gameboy, just like another game that looked like this.
Also, in battle city it was possible to move into the pieces that were destroyed, like only a quarter of a full block, that would be nice, and maybe also improve the AI, even though this is only the demo, I don't know how the real game looks like, I might even try it, just because I liked battle city so much.