whee...
A bit difficult to "pick up", so to speak... when you select a base, there's a small button (among the three at the bottom left corner). The button'll say "Base _" (whatever the base number is). Click that, and you play, then click Battle to fight. To increase your stats, click on the Tankman picture in the upper left corner, and click on a badge to increase your stats. The top is the attack, middle is defense, and bottom is SP reduction. Only problem I got with the game, is that... well... I don't understand how defending should cost a skill point, but okay. It's okay-ish otherwise.