At the beginning of the game you control a red square, which will help you climb the high walls, destroy enemies, for this you need to throw a red square on top of the enemy, so the same if you put the square in front of it can be to shield from attack.
At the end of the demo you will be given automatic, by means of which as so clear you can shoot enemies.
The game is not made in full, you can not die and others are not finalized things.
Thanks for uploading :3