give us a new idea to add to our game

Hello guys , since we are developing our game SERK. we have multiple ideas in our mind to add to our game , we would like to hear from you guys what do you think to add as a game mechanic to our game , we provided a small part of the game to be played on our browser , you can try , don't forget to use a joystick .

tell us what you imagine to add to our game 

thank you ♥