You will gain a new unique skill in each round when your character dies but take note that the maximum time the character can die is only 3!

For the first stage, your character only has dash as its skill. To use it, click and hold the mouse left button and release to activate the dash attack. The longer you hold it, the larger the damage will be. 

For the second stage, your character will now have shoot as its skill as well. To use it, click and hold the mouse right button to activate the shoot attack. 

For the final stage, your character will also have the grenade attack to launch an AOE attack to destroy surrounding enemies. To use it, press on the Q key on your keyboard.