Shelling Invincible Alien Base Version game

Drag the mouse arrow to the right to adjust artillery firing angle, drag bottom of the screen SHOOTING POWER adjustment, click the left and right arrows to select the shells, fired artillery shells left mouse button click. How to get started: Click START - then click on NEW GAME - then click the red dot to start the game. Game description: Modified version of shelled alien base, unlock all the ammunition. Aliens invaded Earth to put into their base here. Pick up the guns opened fire on it to the aliens! Game objectives: Artillery fire, destroyed all the aliens in it!